Carrier 2 Wire Thermostat


The back of a Honeywell low-voltage thermostat, left, and a Cadet line voltage thermostat. (NOTE: Some programmable thermostats do have a built-in time delay for pulling in second stage heat when coming off set-back conditions. A smart thermostat is a great accessory to have, not only to be able to adjust your home's temperature from your phone, but to also save money on your utility costs. Use 22 gauge or larger for normal wiring. When you review a Nest thermostat vs. Explore Richard Ashworth's board "Thermostat Wiring" on Pinterest. What's the easiest way to add the C wire/24 volt to the thermostat. Similar mechanisms may also be used to control oil furnaces, boilers, boiler zone valves, electric attic fans, electric furnaces, electric baseboard heaters, and household appliances such as refrigerators, coffee pots and hair dryers. You cannot receive a refund if you have placed a ShippingPass-eligible order. I have a Carrier model FB4CNF030. I have told you before that the heat pump thermostat is completely different from the regular thermostat or an air conditioner thermostat. Some thermostats do not have a C-wire. Learn more about our connected products and innovations in. These thermostat wire varieties can withstand temperatures up to 63°C. So I see 3 ways to do this. These are generally baseboards and other electric heating systems and they require special attention when looking for a thermostat (meaning not all thermostats will work with these). Humidistats come in two types, which basically comes down to 1-wire or 2-wire controls. Never run wires near any cable carrying AC voltage. The Cadet SoftHeat Baseboard Thermostat is a double-pole The Cadet SoftHeat Baseboard Thermostat is a double-pole thermostat kit for mounting to the Cadet EBHN or EBHA series hydronic baseboard heater. This was not the case. For safety, it utilizes a disconnect box and surge protector via electrical wires contained in a weather-proof cable called a whip. I need a thermostat that can never be changed by a tenant. There are two thermometers in this kind of thermostat. Recently, we just completed an In-depth Thermostat Wiring DIY Guide which covers many wiring situations. I have a RC and a RH wire on my thermostat now. carrier to honeywell thermostat wiring Carrier air to air heat pump (Model FV4BNF003000AAAA) with electric backup, dehumidifier and outdoor temp and humidity sensor. Our customers often ask about thermostats, and many of them want to know if it’s possible to move a thermostat on their own. Honeywell thermostat 2 wire diagram. Totaline Programmable MultiStage Thermostat - P374-1700 The Slimline Platinum Series offers the proven reliability and flexibility of Totaline thermostats. And the Carrier Infinity Touch Control with Remote Services and the Nest Thermostat are two such smart thermostats. The A/C thermostat only has an Rc, Y, and G wire. At Johnson Controls, we design our HVAC thermostats to create the ideal building environment through comfortable temperatures, high operating efficiency and energy savings. Your new thermostat has the jumper wire built in. What's the easiest way to add the C wire/24 volt to the thermostat. I am interested in installing a smart thermostat but lack the c wire at the thermostat. Use these tips to wire a. Outdoor thermostat 910-1644 2. Wiring is: (T-Stat - Furnace. Honeywell thermostat 2 wire diagram. Increase comfort while you decrease energy costs with Increase comfort while you decrease energy costs with a Honeywell 55-2 Day Baseboard Programmable Thermostat. The color of wire R is usually RED and C is BLACK. Remove the screws that are holding the thermostat to the wall and gently pull the thermostat away from the wall to expose the wires. We'll walk you through your options below. Wholesale Thermostat Manufacturers, from Thermostats Wholesalers. All ComfortNet indoor and outdoor controls and thermostats are designed using the ClimateTalk open standard providing advanced, yet simple, system-wide communication, diagnostics and expandability. Once you select a Carrier thermostat and want to wire it by yourself, remember to add this guide to your favorite list. Heat pump thermostat wiring - A typical wire color and terminal diagram. Replace it as discussed in the article How to Install an Electronic Thermostat. I am on my 4th thermostat adapter. So, the spiffy new wi-fi thermostats want power on the C wire from thermostat, but the old thermostat doesn't have a C wire at it. If the blower goes on and the furnace burner ignites, the thermostat was improperly connected to the wires or is defective. The Carrier thermostat only had a red wire (V+) and black wire (Vg) attached to the wall wiring, and the Honeywell unit has wiring designations of B, O, G, Y, W/AUX, NOT USED, R AND Rc. Online find wholesale Thermostat Suppliers to get free quote & latest prices at Online Marketplace, P. In this article I will explain to you the difference and I will show you how to replace it and how to hook up all the wiring. Most thermostats have a Red wire that is the power wire that usually connects to R & RC terminals of the thermostat, a Green wire that energizes the Fan relay, connected to the "G" terminal on the thermostat, a Yellow wire that energizes the outdoor unit's contactor, (if you have air conditioning) and a white wire that energizes the gas. Click to add item "500' Southwire® Thermostat Wire 18/2" to the compare list. When testing the connections on the heater with my multimeter I'm not even getting 12v. You are eligible for a full refund if no ShippingPass-eligible orders have been placed. Wire specifications Use 18- to 22-gauge thermostat wire. Commonly used green, white, yellow, and red thermostat wires. A Carrier® thermostat is your comfort command center. how do i wire a honeywell-rth2300/rth221 where the wiring was for a white-rogers-1f58w series no heat pump hooked - Honeywell Programmable Thermostat Heater question. Thermostats for Central Heat & Air. I have a Carrier model FB4CNF030. Keep wires in this shaded area CAUTION: ELECTRICAL HAZARD. STEP #2 REMOVE & REPLACE OLD THERMOSTAT Page 3 Keep the old thermostat for reference purposes, until your new thermostat is functioning properly. Sensor 1 Sensor 2 Sensor 3 Sensor 4 Damper Control Module ZS_ ZS_C A03233 Fig. If there are only two wires, the simplest solution is to get a replacement with a battery-powered display. one of those wires goes to every relay (switch). Never run wires near any cable carrying AC voltage. The best thermostat should be able to detect with high level of certainty, the room of your home that is too cold or hot for you. Older wires will have only 2 or 4 strands but the 5 strand will provide that extra wire known as the c wire. Place the probes on the wires or terminals. Press and hold the s and t buttons simultaneously (for three seconds) until the display appears as shown below. I have jumpers going from R <>RC and a 2nd Jumper from W2 <>Y2. Some common problems may include a system that is not heating or cooling enough or a system that is not running at all. This is the Y wire, this is the W, this one's the G, and this one's the RH. The manufacturer reserves the right to discontinue or change specifications or designs at any time without notice and without incurri ng obligations. 5 If the burner does not ignite, check the continuity of the wires from the thermostat to the furnace. Find great deals on eBay for thermostat 2 wire. Disconnect wires and remove base 7. Re: 3 AMP fuse keeps blowing out on Carrier furnace With all the wires attached inside the furnace and power on - if you take off the thermostat (off the base or wall plate) and the fuse stays good then the wiring is ok and the thermostat is bad if the fuse still blows, the tstat is probably ok and the short is elsewhere. Heck, now I’m not calling anyone a dummy! Even the most seasoned people who enjoy DIY may come across problems with wiring a thermostat. White wire to W (for the furnace). The goal is to optimize your home temperature and save money. The Edge utilizes the same proven 2-way paging technology that Carrier has been using since 2001 with over 178,000 thermostats delivered to utility customers across the US. WIRING DIAGRAM NO. Please refer to Wiring Table to determine the appropriate wire connections. Thermostat must be connected to the Internet and connected to a user account. Some face plates pull off while others need to be released using a screwdriver. Wiring an AC thermostat becomes necessary when a remote. Unscrew thermostat from its wall-mounted sub-base. Take note of the different size of wires between the two types of thermostats. The goal is to optimize your home temperature and save money. LENNOX HEAT PUMP WITH W-2 WIRE TO HONEYWELL THERMOSTAT. The main trouble is dealing with those different colored wires, knowing which one does what and if that wasn't enough, you also have numbers and letters to deal with. Cannot be installed with the PEK if a C wire isn't present—C wire must come from the air handler, not the boiler Regarding Proprietary Systems: If you currently have a communicating thermostat and equipment with proprietary features (such as variable fan speed), ecobee thermostats will not be compatible right out of the box. ) The Relay Assembly is not needed if used for electric heat. The thermostat conversion kit is available for retrofit (4-wire) applications. Carrier offers thermostats and controls for the highest degree of climate control, from temperature to humidity, while staying energy efficient. I have a Carrier model FB4CNF030. To clarify, the black wire that's connected to the RH is supplying the power that the thermostat can use to tell the furnace what to do. Modern thermostats have many extra features that need additional power such as a large screen or wireless connection. The first thing you want to do is check for a C-wire by looking at your old thermostat. You may need to run a 3-4 wire strand of new thermostat wire or even get help from a friend locally to help you wire it up. I added some wiring labels to make this easier to read. Once you select a Carrier thermostat and want to wire it by yourself, remember to add this guide to your favorite list. The Ecobee has a PEK kit that you can install at the boiler to effectively create a c wire there. About your new thermostat SETUP WIRING ASSISTANCE TROUBLESHOOTING Connect wires: Heat Pump 1. On-screen heating power indicator gives at-a-glance verification of power being used, and 2-wire non-polarized connection means fast, hassle-free installation. I'm putting a new 2-stage variable speed furnace in my house and I want to upgrade the thermostat to a 2-stage one to better control it. thermostat terminal / wire control and supply wiring (oem / vendor) ceiling assembly terminal designation r or red one red, (+) 12vdc supply wire to the thermostat n /a b or blue two blue, one (-) 12vdc supply wire to the thermostat and one blue wire to ceiling assembly / plenum b y or yellow one yellow, compressor control wire to ceiling. If there is a call for cool, R is connected to Y (compressor). Installation and Start-Up Instructions Visit www. Go I have a carrier thermostat model 960 120032-2 an. Forum discussion: So I bought a couple fancy new wifi enabled thermostats for my house recently and screwed up installing one of them. One for heat (Nest that I installed because it had the C) and one for A/C. See also 2 Wire Thermostat Wiring Diagram Heat Only Book Of Nest Wiring - Nest Wiring Diagram With Heat Pump from Nest Wiring Diagram Topic. existing thermostat wiring in case you need it for reference later. The outside air was in the 50’s (normal temperate northern CA winter). It depends more on the particulars of the heating/cooling system. You need a thermostat that has highly responsive remote sensors which will distribute temperature accordingly. I have a RC and a RH wire on my thermostat now. Heat sequencer wiring diagram / gas furnace, Heat timer seq 6 boiler Carrier heat pump wiring diagrams – doityourself. 18 gauge thermostat wire. Wiring Diagram software Review thermostat Watts Full Image for Based. This intermediate installation is pretty straightforward, but only if you already have the necessary wiring. Almost all smart thermostats require a C wire. But it’s usually 1 or 2 degrees. It has 24-volt hot and 24-volt common along with the wire for the heat which is likely white. 2 in this manual for wiring diagram. Remove the thermostat body from the base by gently pulling them apart. Shielded cable is not required. 1 On an Android device go to the Play Store. This thermostat is not compatible with electric baseboard heat (120-240 volts); 5-2 scheduling lets you create unique weekday and weekend programs, or schedule the entire 7-day week the same. Carrier Infinity thermostat comparison, you will find that only Nest makes its pricing readily available online. All ComfortNet indoor and outdoor controls and thermostats are designed using the ClimateTalk open standard providing advanced, yet simple, system-wide communication, diagnostics and expandability. To wire a thermostat of this kind, basic electrical skills, tools and safety techniques are required. I have three wires in my existing progammable thermostat and want to upgrade to a wifi thermostat. These are generally baseboards and other electric heating systems and they require special attention when looking for a thermostat (meaning not all thermostats will work with these). Thermostat Wire Connections Electrical Question #1 I am wiring a thermostat, how do I know which wires to connect to the terminals?. Smart Thermostat and Wi-Fi Thermostat Options. As shown in the diagram, you will need to power up the thermostat and the 24V AC power is connected to the R and C terminals. requires a special series--parallel wiring method with a specific number of sensors. The A/C thermostat only has an Rc, Y, and G wire. * C may not be used on all systems. Never run wires near any cable carrying AC voltage. Honeywell RCHT8610WF2006 Lyric T5 Wi-Fi Smart 7 Day Programmable Touchscreen Thermostat with Geofencing, Requires C Wire, Works with Alexa Carrier Thermostat. Carrier Single-Zone Ductless System Insteon Smart Wall Switches - Dimmer Switch (2-Wire) LEARN MORE. Push excess wire back into the wall opening. Increase comfort while you decrease energy costs with Increase comfort while you decrease energy costs with a Honeywell 55-2 Day Baseboard Programmable Thermostat. carrier thermostat - compare prices at BuyCheapr. Thermostatic Controls - Replacing Carrier Thermostat 960-120032-2 with Honeywell RTH9580 wi-fi - Hey guys, I just purchased my first house and it has a carrier thermostat 960-120032-2. Heat pump thermostat wiring - A typical wire color and terminal diagram. Maximum Wire Length The thermostat may not function properly if the total resistance of any of the thermostat wires exceeds 2. Many older homes have outdated thermostats in which you turn a knob to set it to the desired temperature. I’d put all the wires exactly where they go. Can also be used for heat pumps, 2-stage heating or cooling when an existing 4-wire thermostat cable is present. The Ecobee has a PEK kit that you can install at the boiler to effectively create a c wire there. The one in the cover displays the temperature. This is the Y wire, this is the W, this one's the G, and this one's the RH. A Two-Wire Relay Module option allows you to connect to a system using only two thermostat wires at the wall. Download 304 Carrier Thermostat PDF manuals. Wiring Guide for a Honeywell Thermostat Electrical Question #1: How do I connect the wires for a heater thermostat? I bought a Honeywell Heating thermostat. How to Wire an Ecobee EB-SmartSi-01 Thermostat to a Carrier 58PAV Furnace, a step-by-step tutorial on how to provide power from your furnace to the thermostat. A thermostat turns your furnace and air conditioner on or off depending on the temperature in the room and the setting on the thermostat. Wiring doesn't depend much on the thermostat features, though. All wiring in the ComfortChoice system may be unshielded. 3) Run an additional wire from your equipment to the thermostat. Modern thermostats have many extra features that need additional power such as a large screen or wireless connection. carrier air conditioner thermostat wiring diagram central wire a hvac,air conditioner thermostat wiring schematic handler diagram data coleman rheem,home. Use a screwdriver to loosen screws, insert wires into hole, then tighten screws. How to wire a thermostat. Can cause electrical shock or equipment damage. Pull off cover from existing thermostat. Not sure? Contact support. 11-808-579-01 · 10/5/2016. If you see two different sets of labels for each wire, only enter the labels that correspond to your system type (Heat Pump or Conventional) as indicated on the thermostat backplate. Your new thermostat has the jumper wire built in. Carrier Thermostat Wiring. Thermostatic Controls - Replacing Carrier Thermostat 960-120032-2 with Honeywell RTH9580 wi-fi - Hey guys, I just purchased my first house and it has a carrier thermostat 960-120032-2. There are several ways to install programmable or wifi thermostats without a C-wire, it just takes some additional work. Keep wires in this shaded area CAUTION: ELECTRICAL HAZARD. I have a Carrier Edge thermostat but we wanted to replace it with a smart thermostat. These two connections will ensure that there is power to the. Function number Option number 2. Push excess wire back into the wall opening. Carrier offers thermostats and controls for the highest degree of climate control, from temperature to humidity, while staying energy efficient. Not sure if this will help but I had a Carrier system that only had two wires. I bought one at Menards and they figured out how to override the lock out feature. This thermostat is not suitable for 2-wire, heat only applications. Carrier thermostat wiring, Honeywell thermostat wiring - it's all basically the same. The thermostat requires 2 conductors. First with the power off I connect the optional common wire up to the thermostat. We’ll walk you through your options below. To wire a thermostat of this kind, basic electrical skills, tools and safety techniques are required. Turn the power on at the breaker box or switch. Honeywell thermostat Wiring Diagram New. How to Install a Digital Thermostat. ) Which one takes the title as best smart thermostat? Read on to find out. Modern thermostats have many extra features that need additional power such as a large screen or wireless connection. You do this prior to adding Thermostat number 2 then once you have your indoor furnace up and going with your new thermostat you are ready to proceed to the easy part, wiring up the 2nd thermostat to control the fan when running the OWB. Our KONO Smart thermostat was made with you in mind. 365 day right part guaranteed return policy. Carrier Ac thermostat 6 Ac thermostat Wiring Diagram Inspirational. Thermostat Commercial Non-Communicating Programmable Thermostat. Next, make sure the colored wiring is connected properly inside the unit. Evaporator Defrost Thermostat 5 TEMP Thermostat 6 Variable Volume and Temperature (VVTT) and Relay Pack 7 Airside Economizer 8 Airside Economizer with Indoor Air Quality (IAQ) Sensor 9 Fire and Smoke Control 10 Heater 11 CARRIER THERMOSTAT WIRING UNIT 50BYN THERMOSTAT DESCRIPTION FIG. I have jumpers going from R <>RC and a 2nd Jumper from W2 <>Y2. Honeywell thermostat Wiring Diagram New. Our customers often ask about thermostats, and many of them want to know if it’s possible to move a thermostat on their own. Heat sequencer wiring diagram / gas furnace, Heat timer seq 6 boiler Carrier heat pump wiring diagrams – doityourself. Please refer to Wiring Table to determine the appropriate wire connections. The main trouble is dealing with those different colored wires, knowing which one does what and if that wasn't enough, you also have numbers and letters to deal with. Easy online ordering and next-day delivery available with 24/7 expert product support. ENVIRONMENTAL HAZARD. bus), the problem may be in the thermostat wire, or the outdoor unit wiring. Insteon 2441TH Thermostat Wiring. So I see 3 ways to do this. This unit is $80 cheaper than the original Nest and is the best smart thermostat under $200. The Nest learning thermostat might not be the sexiest gift you give this holiday season but it probably would be one of the most frequently used. If all is fine, then the issue is either with the furnace or AC. There is no other source of heat aside from the baseboards. Our customers often ask about thermostats, and many of them want to know if it’s possible to move a thermostat on their own. It provides a temperature. " Remove the. Take clear notes on how the thermostat operates by testing it with an assistant within the shop. The best thermostat should be able to detect with high level of certainty, the room of your home that is too cold or hot for you. This is the Y wire, this is the W, this one's the G, and this one's the RH. No C wire in this example. Replacement thermostats are available for Atwood, Suburban and Coleman analog or digital rv thermostats. I have three wires in my existing progammable thermostat and want to upgrade to a wifi thermostat. Older wires will have only 2 or 4 strands but the 5 strand will provide that extra wire known as the c wire. If it is digital it has battery power to power the thermostat. By design, the Nest Thermostat E doesn't work with complex HVAC systems that use multiple stages for both heating and cooling, though the simple wiring is one reason the Nest Thermostat E is easier to install than most other thermostats we tested. Find the two wires that are connected when you sellect Fan On. Remove existing thermostat from wall. The thing about this Honeywell Thermostat is that it needs a C wire to operate optimally. Make the appropriate wire connections based on the specifications of the household HVAC unit(s). Most thermostats will work with this system. Digital Thermostat 2 - Wire Operation No Batteries Required Simple, Single Setpoint 7 Day Programmable 4 Time Periods Very Easy to Program Large, Easy To Read Display Thermoglow Backlight Locking Keypad 2 - Wire Meets California Title 24 Heat only, or Cool only 72 7HE2 AT Mo I2:34 TOTALINE TOTALINE Replacement Components Division Carrier. T Stat Wire thermostat Wiring Color Code Lovely Wire T Stat Diagram. Installing WiFi Thermostat: Can I substitute C wire with G wire? Everything is electrical, there is no gas or propane, or heat pump. This electric baseboard thermostat is compatible with electric baseboards convectors radiant ceilings (2-wire) and fan-forced heaters. Peirce-Phelps is an HVAC Distributor that sells wholesale air conditioning units, heating equipment, indoor air quality, HVAC accessories, HVAC parts and supplies to the Pennsylvania, New Jersey, Delaware and surrounding tri-state area. The 5 strands of wire provide enough functions for the modern thermostat. I am interested in installing a smart thermostat but lack the c wire at the thermostat. THERMOSTATS & ALARMS 11 The PRO-Series line of thermostats combines sleek smooth designs with maximum functionality. LuxPro PSM40SA 2 Wire Thermostat - Heat and Cool but do sometimes deliver on Saturday depending on the carrier that is. Commercial Thermostats. 18/2-Gauge Thermostat Wire 64162179. Find Carrier Furnace Parts at RepairClinic. B efore you assume your furnace or A/C is malfunctioning, try these simple steps to make sure it isn't a problem with your thermostat. Get shopping advice from experts, friends and the community! We have a home in Florida, go north in the summer,and have the temp set at 78. Our goal is to make sure you have a great indoor experience. Breaker box Switch Two labels Tip: Take a picture of the wires on your old. 3 Only those sections of Article 300 referenced in this article shall apply to Class 1, Class 2, and Class 3 circuits. The thermostat will keep the temperature within 1 or 2 degrees of the set temperature, although this may translate to more frequent furnace cycling. This thermostat is not suitable for 2-wire, heat only applications. This model is designed to be incredibly easy to install and includes a front loading battery compartment to hold 4 “AA” batteries to power the thermostat for two full years, or it can be powered by the HVAC systems 24 VAC “C” wire. Carrier Thermostat User Manual. requires a special series--parallel wiring method with a specific number of sensors. A new or improved thermostat can help increase energy efficiency when running your furnace or air conditioner. Many digital thermostats require 24 volts for power so the common wire is necessary. KONO Smart comes with our gorgeous black stainless cover, but it’s about you and we want you to love KONO, so how KONO loo. Take the housing off of the old thermostat. Leave all other wires connected to the. Some thermostats do not have a C-wire. I took the old thermostat off the wall to find only 2 wires (VG and V+). Honeywell thermostat wiring color code. Carrier Heat Pump Wiring Diagram Thermostat | Free Wiring Diagram - Nest Wiring Diagram With Heat Pump Uploaded by Bismillah on Friday, February 8th, 2019 in category Nest Wiring Diagram. Download 304 Carrier Thermostat PDF manuals. Disconnect power before wiring. HVACpartners. he changed the thermostat 3 times over a couple month period. The A/C thermostat only has an Rc, Y, and G wire. Shielded cable is not required. Find Carrier Furnace Parts at RepairClinic. These old thermostats can be inefficient and cause heating and cooling bills to rise. Remove the old sub-base. Get the best deal for Industrial HVAC Thermostats from the largest online selection at eBay. Honeywell Smart Thermostat Wiring Instructions RTH9580WF The most "meaty" part of installing a new Honeywell smart thermostat, is correctly wiring it up. Honeywell RCHT8610WF2006 Lyric T5 Wi-Fi Smart 7 Day Programmable Touchscreen Thermostat with Geofencing, Requires C Wire, Works with Alexa Carrier Thermostat. Totaline Programmable MultiStage Thermostat - P374-1700 The Slimline Platinum Series offers the proven reliability and flexibility of Totaline thermostats. Shop with confidence. The color code for the 120 volt side sometimes varies but usually will have one white and one black wire. Take note of the different size of wires between the two types of thermostats. Although there are many other models available, these are two of the most popular (and for good reason. your old thermostat had 2 C or C1 wires, wrap each separately with electrical tape and do not connect them. The CMH-14A consists of: 1. Each tier has programmable and non-programmable options for air conditioner, heat pump or 2-speed applications. The most common benefit of having 5 conductors is being equipped with a common wire, known as the c wire. Get shopping advice from experts, friends and the community! We have a home in Florida, go north in the summer,and have the temp set at 78. Our KONO Smart thermostat was made with you in mind. Some face plates pull off while others need to be released using a screwdriver. Check if your home heating and cooling HVAC equipment is compatible with ecobee smart WiFi thermostats. If thermostat wire checks out OK, check wiring inside the unit control box. If not then you do not have a C wire. KONO Smart comes with our gorgeous black stainless cover, but it's about you and we want you to love KONO, so how KONO loo. Find the two wires that are connected when you sellect Fan On. Wire specifications Use 18- to 22-gauge thermostat wire. 2 before the recall and 2 after and I almost just had a tech sending out my 5th but fortunately our call was disconnected and when I called back in I received a much more thorough tech who did research and found that the Insteon IPhone app is broken for everyone until ios6 came out (which incidentally didn't. the thermostat set point. I have jumpers going from R <>RC and a 2nd Jumper from W2 <>Y2. Make sure all wires are tightly attached, and run to the appropriate terminal. This is the Y wire, this is the W, this one's the G, and this one's the RH. The color of wire R is usually RED and C is BLACK. Call Mid-State Air Conditioning and Heating in Nashville, TN if you need help with your home's thermostat. com from each wire. Read our blog and still not seeing the thermostat you need?. Disconnect wires from existing thermostat, one at a time. The back of a Honeywell low-voltage thermostat, left, and a Cadet line voltage thermostat. If all is fine, then the issue is either with the furnace or AC. Some common problems may include a system that is not heating or cooling enough or a system that is not running at all. Thermostat must be connected to the Internet and connected to a user account. Wiring is: (T-Stat - Furnace. - The R wire from the cooling unit should be connected to RC. I have 2 thermostats. A little help diagnosing an air conditioning problem because if you see your thermostat's blank then you know that you are either missing 24volt power, or you are missing power from the air handler altogether. Saves significant time and expense as compared to repulling of new cables. Many digital thermostats require 24 volts for power so the common wire is necessary. This intermediate installation is pretty straightforward, but only if you already have the necessary wiring. The manufacturer reserves the right to discontinue or change specifications or designs at any time without notice and without incurri ng obligations. 365 day right part guaranteed return policy. Ordinary thermostat wire is ideal for all connections. B efore you assume your furnace or A/C is malfunctioning, try these simple steps to make sure it isn't a problem with your thermostat. Some thermostats do not have a C-wire. The sensor wiring MUST be completely separated from the thermostat or any other control wiring and must NOT be in the same conduit as high voltage wiring. Call (734)326-3900 to speak with a technician for additional information on each Carrier replacement part. First with the power off I connect the optional common wire up to the thermostat. My old thermostat has 4 wires connected to it with 2 extra ones unused in the wall. From the relatively simple to maneuver non-programmable thermostats of yesteryear to a series of programmable thermostats that utilize Wi-Fi and touchscreen, the Honeywell Store features no shortage of options when it comes to acquiring the perfect thermostat for your home or place of work. I connected the blue wire to the R and the white wire to the W on the old thermostat and shoved the new Honeywell 5-1-1 Day programmable thermostat up the first guys *** that i ran into at Canadian Tire Thanks for your help. your old thermostat had 2 C or C1 wires, wrap each separately with electrical tape and do not connect them. This comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit. This is a red wire and comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit. Take a photo of your existing wiring before removing your thermostat from the wall. A Carrier® thermostat is your comfort command center.