how to wire electric fan to thermostat

However, your system may not be common and different colors could have been used. In the most basic system, this functionality is provided by use of a fan center relay, and the low voltage wiring to the thermostat now will require a minimum of three wires (for heat only units) and four wires (for heat / cool / fan) for control. But, it is entirely possible to control both systems with a single thermostat. Another option is to transplant a fan from another car. It's simple wiring. Insert the wall anchors and push them hard with your thumb. Setting the heat anticipator is important for your heating system. http://www.jameco.com/webapp/wcs/stores/servlet/StoreCatalogDrillDownView?langId=-1&storeId=10001&catalogId=10001&freeText=24%20volt%20relay&search_type=jamecoall. Some wall anchor kits come with a bit in them. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. system. Hold it up to the wall in the position you want it. (or if they didn’t match, the color markings you made with masking tape). Pull the cover off the front of the thermostat. SINGLE STAGE ELECTRIC FAN THERMOSTAT PART # 16720 & 16721 WIRING Before starting, disconnect the Negative (-) cable on the vehicles battery. The bit should match the size of the wall anchors you have. These cookies do not store any personal information. The wire used for heat is typically going to be different for the wire used for cooling. It is set in the thermostat or thermostats. 11 Secure the ends of both white leads together with a wire connector. You can use a level to do this. Helpful Page to help you select the right thermostat (opens in a new window). A large majority of homes today have an HVAC system containing a Furnace (Oil, Gas or Electric) and An A/C Unit. In the most basic system, this functionality is provided by use of a fan center relay, and the low voltage wiring to the thermostat now will require a minimum of three wires (for heat only units) and four wires (for heat / cool / fan) for control. Gas Heating Troubleshooting and Repair Index, Questions You Need To Answer Before Changing the Thermostat, How to Wire a Thermostat – Selecting the Proper Tstat, Before You Begin Replacing the Old Thermostat, Steps and Procedures for Installing the new Thermostat, How to Wire a Thermostat – The Colors and Terminals, How to Wire a Thermostat – Removing Wires, The Colors and Terminals on the New Tstat, How to Wire a Thermostat – Thermostat Wiring Diagram, UVC Light to Kill Viruses and Other Airborne Harmful Things that Affect Health, Successful Thermostat Installation Advice Article, Helpful Page to help you select the right thermostat, HVAC Products Containing Mercury and Proper Disposal, https://highperformancehvac.com/honeywell-furnace-fan-limit-control-temperature-switch/, Blank Display Problem – Screen Disappeared, Honeywell Heat Pump Thermostat Troubleshooting, How Can I Tell 1 or 2 Transformers for Heating Cooling System, How to Wire an Air Conditioner for Control – 5 Wires, Thermostat Wiring Instructions not Matching New, What Temperature Should I Set My Programmable To, Wiring a Programmable for Geothermal Heat Pump, the most common trouble call by service and repair HVAC companies, about thermostat wire with a resource for more information, the best advice for changing your thermostat, the most common mistakes made by DIY thermostat changers. Important not only for your safety but also to keep from blowing the transformer. It makes a perfect wire loop to go under the screws and therefore a more secure termination of the wire. I would like to know how to wire two heating If you do it in the way I am going to show you, you won’t have the ability to turn on the fan by itself. Cut the wires with a wire cutter if they are attached to a defunct heating appliance. The same with W3. How to wire a thermostat. The thermostat wiring on these systems can have very similar wiring properties. Is the power off? 4 Start and check the heating. Because some people believe the only problem is with the thermostat. Probably best to call a professional to hook this up for you as it is difficult to say without looking at the system you have and how it was wired. Is there any way to do this conversion? Finally, once you have made the thermostat selection you can proceed to the next step. Furthermore, for more information, please see HVAC Products Containing Mercury and Proper Disposal. Use this option to replace virtually any two-wire or four-wire line voltage wall-mounted electric heating thermostat. Your email address will not be published. If not, what tells the air handler fan to run in a split system with gas heat? This website uses cookies to improve your experience while you navigate through the website. Round thermostat? Will Wyze Thermostat work with electric baseboard heating? Get the level and make sure the sub-base is level. If the thermostat instructions say nothing about the anticipator, don’t worry about it. If the fan is not turning in the right direction, air will be blown away from the radiator, and will not help to cool the radiator. Leave enough cable at each end to work with. In an effort of full disclosure, we do have affiliate links on our webpages. A cheap on/off furnace thermostat would work but like Ork said its a 24 volt system. 24-volts for residential but if it is commercial or light commercial it could be different. There are three stage heating thermostats you can purchase that have terminals W1, W2, and W3. The standard setup involves a low-voltage loop (24V or less) through the thermostat, so that when the thermostat switch closes it activates a relay which in turn controls the circuit which powers the actual heating/cooling/fan/whatever There probably are self-contained plug-in thermostats, but I couldn't tell ya where to get one without websearching... and you can do that as easily as I could. The thermostat interrupts the circuit like a wall switch interrupts a light circuit. FYI: Stego makes thermostat switches that don't require 24v. If this is the case the only benefit you will get from a programmable thermostat or thermostats is at night. I’d like to convert from the push-button switch to a thermostat, preferably a programmable but at least the “new round” Honeywell (not the digital). Electric fans are commo… Low-voltage thermostats designed for gas, oil, or heat pumps won't work … We will describe the common type (at least for this region (mid-Atlantic) and if you see that you have the system described you can proceed cautiously at your own risk. The STS/STO model (part #s 01115.0-00, 01116.0-00, 01115.9-00, 01116.9-00) has adjustable temp setting, and about a 7-degree difference between when it clicks on and off. The old analog thermostat in my cottage reno property was old and ugly! How should I wire the new thermostat. As far as the wires are concerned you will have to trace them out to see where they go. Wire up your starting circuit First, you need to drill 20mm holes in the sides of the junction box, so that you can fit in the cable glands. C) The fan control is a small 24vAC relay that can open and close contact       to run a pump or fan that use 120VAC. Insert this into the hot wire of the fan, leave the neutral return wire unbroken. Route the 16-guage wire up the fenderwell and through the firewall to just below the dash. In the same room, there is a perimeter heater (hot water) which is controlled by its own thermostat (the thermostat controls the modulating valve on the perimeter heater). However, there is an occasional oddball who knows better than everyone else. Now easily tape the wires and butt connection to hold it in place. However, I do not know if this would be proper for your situation because of how the 3 stage thermostat will work. The third thermostat wire connects directly to the boiler’s transformer and from there to the third circulator. 9 years ago. After doing that, make sure the power is off by turning the thermostat to the on position. Green – The green wire connects to the fan. This additional terminal is labeled ‘G’ in the thermostat. If the thermostat calls on W3 then you would have all three energized and that may cause problems with the furnace controller. It is possible you could have two different transformers in that system so you would need a thermostat with an RC/RH termination in the thermostat. If you have a phone number for the manufacturer of the furnace I would call them and ask them about it. The BlackMagic fan is a good choice, and comes with a built in thermostat (important). Two wires coming from wall, replaced bi-metal type tstat with digital programmable. The attached photo is a photo inside the HVAC. The furnace can do it with actual temperature sensors (furnace controls the fan) or the thermostat can do it with start-up and shut-down delays. It should have the same setting as the old anticipator setting. Wyze Thermostat was made to control low voltage (24V) heating systems only. However, they can be different depending on who wired the unit and their color-coding system. Hey. (This is very important, especially for mechanical thermostats. The wire running to the thermostat seams to be from the AC unit not the boiler. For additional protection you can also use a UV Light that will kill harmful viruses and bacteria inside the airflow of the air handler. Suggested Blogs & Resources. I do love doing things like this and have done many retro’s for control circuits in the field but every circuit is different along with several different factors involved in the control circuit. Importantly, remember to set the new thermostat to this same setting. I’ve used ones that you pushed the wire in, applied pressure to the end piece and it was locked in. It's simple wiring. However, the thermostat will turn on the AC heater or fan automatically hence there’s actually no need to turn on the fan by itself. Furthermore, an improperly set anticipator will cause your furnace or heater to run improperly. However, during the process, they touched the wrong wires together and blew the transformer — finally, the transformer powers the HVAC control circuit including the thermostat. Finally, the ones that are not successful end up calling a professional in to install a new thermostat. 3-Wire Thermostat Wiring; This is common for a digital thermostat that controls a boiler. Furthermore, with heat only, you likely will have a 24-volt hot and common (red and blue), a white wire for heat and a green wire for a fan. Finally, factor this into your decision and if there is any doubt call a professional. But opting out of some of these cookies may have an effect on your browsing experience. SINGLE STAGE ELECTRIC FAN THERMOSTAT PART # 16735 (Continues on reverse side) KIT CONTENTS QTY. Furthermore, here is a list of possible thermostat wiring combinations beginning with the most common first: This is the most common and covers many central air conditioners with an air handler or gas furnace. Call a professional to install and wire the new thermostat. Retain as much of the wiring as possible to the thermostat for future connection to the baseboard heater. Furthermore, the wires going to the condensing unit are shown in red and white. However, these colors can be different. I can send you a wiring diagram of how this is. Step 5 Run an additional wire from the furnace to the terminal in the thermostat labeled G. This is … Whats the cheapest way to wire the fan through some sort of thermostat that will trigger it to come on when it reaches say 25 degrees, and then back off when it reaches 23 or something like that. Required fields are marked *. If you are not comfortable with wires and electrical systems, I recommend that you contact a professional. Any products which contain mercury are illegal to sell now. If you do not have any of this experience along with the confidence to do it then I recommend calling and HVAC contractor to do this for you. I am trying to rewire a 5 wire Honeywell thermostat. I have a fan for a greenhouse that I need to turn on at certain times to counteract the Texas heat, I was just wandering if I could just go to a garage sale and buy one then wire it to the power chord or is there a special small one that plugs into the wall socket. The thermostat may need to be configured to your heating system. Make sure it is as level as possible. Is this possible? Also, connect the white wire from the fan to the black wire from thermostat. With two different thermostats it is easy to have both systems running at the same time which is a waste of energy. Basically the AUBE RC840T-240 controller is switching that wire circuit on and off. does it matter which wire I put into R and W, both same and not marked. Do I need to have a C-wire, or “common” wire? Tape the bag below the area where the thermostat. 12v switched wire to green wire at a/c clutch. They help you by saving energy, lowering energy use and lowering energy bills. the importance of identifying the type of HVAC system you have so you will select the proper thermostat. Thank you in advance. The wires are blue,green,white,orange and red. That is for most air conditioning and heating systems. We help you learn more about their system as a whole. The relay has four terminals--one that is hot all the time, even with the key off. The rooftop unit is doing cooling and heating. This thermostat wiring diagram is a split system. All other wires, except the common wire, controls a specific relay or contactor. Other questions about a Honeywell thermostat, Honeywell thermostats, programmable Honeywell thermostats are found at the Honeywell Thermostat website. Thanks. Reply: Patrick, typically the three wire thermostat hookups would be … The two thermostats that are connected to the switching relay gets power from the Rh wire, whereas the third thermostat the Rh does not provide any power. IDK if the gauge on this wire is different, if I’m just a klutz or what. Furthermore, older mechanical thermostats contain mercury, and mercury is extremely hazardous to human health and our environment. Importantly, turn the power off to the air conditioning and heating unit at the circuit breaker or the emergency cutoff switch. When installing an auxiliary fan or simply wiring the factory fan so that the driver can manually turn the fan on and off, make sure the fan is turning in the right direction. A new or improved thermostat can help increase energy efficiency when running your furnace or air conditioner. 24 volts is the most common but in your case, it could be different. How to Wire a Attic Fan. What can I do to get power to the third thermostat with only the red and white wire? Is it dedicated to your home or space? Since I plan to replace it with the same type model.. These systems can be very complex and may require special sub-bases so the thermostat control circuit will work properly. Straight cool means no heat, just cooling. DESCRIPTION 1 Thermostat Switch 1 Relay Wire Harness 1 3/8” NPT Thread-in Probe 1 Push-in Probe 1 1 x 1 Foam Pad 1 Retaining Clip 4 4” Wire Ties QTY. The thermostat is nothing more than a switch that opens and closes the 24 volt hot leg off the transformer. The unsuccessful end up paying three to four times what they would have paid if a professional was called first. If any cooling, like an air conditioner, or fan control is required, more wires are needed. Thank you very much! and off at 175°F. If it is a 5 ton straight cool air conditioner then it does not have heat. Just make double sure that you have killed power to the unit. you need a common wire from the transformer which means you need 18-3 minimum to make work. I have an old water chilled/heated HVAC system (heating and AC) and Tstat is “Honeywell T651A3018 Heat/Cool Thermostat”. Sometimes the green wire may also be bare in color. Ibought a new 18 seer 5 ton stright cool condensing unit and can not get it to run it has 2 stage heating and cooling can you help me thanks. The only thing I can say is to make sure you check to make sure you have it set to heat and temperature set point is turned up above the room temperature. For both the condensing unit and the air handler/furnace/or boiler. Run a live circuit cable from the panel to the box and another cable from the box to the heater. Dave’s Reply: Thank you for your electrical wiring questions. They can quickly identify what you have and wire it properly for control. I would like to install a new thermostat that is a WIFI unit. Appreciate your help. You probably want to do this now before you proceed further. I also hooked up the ground wire. Find the feeder wires and strip about 3/4 inch of the insulation from the wires. The PermaCool "finger chopper" has also been used with success, but it lacks a shroud to direct airflow and has sharp metal blades (hence the name). To make a C wire should I use the transformer in the air handler? I do think I need to use a 24VAC transformer (Honeywell Aube Technologies RC840T-120 Electromechanical transformer with Built In Relay from amazon) to convert line voltage to 24v which is compatible with these newer Tstats but I am totally lost how the wiring should look like. Do you understand basic electrical and electronic circuits and the laws and rules? 87 (red wire) connects to the positive wire on the electric fan. Units on a same thermostat. The people that were unsuccessful wasted part of their day, ruined a thermostat or two and caused the malfunction of an integral part of their system. I want to upgrade my Tstat to a newer Tstats like nest or ecobee etc. It was 110 degrees yesterday so it’s not the temp causing the temperamental wiring. In labs researchers used a spectrum of ultraviolet light called UVC to kill viruses. Finally, they will be happy to accept your old thermostat and dispose of it properly. Use this option to replace virtually any two-wire or four-wire line voltage wall-mounted electric heating thermostat. it is different depending on the age of the furnace. Connect the white wire to the load neutral wire and the green, which … Use the wire nuts to connect the wires from the thermostat to those of the fan. Not hold than any other HVAC system containing a furnace ( Oil, or “ common ” wire between! Otherwise destroy the engine if allowed to remain did not install the new sub-base back on the sub-base hold up! With both the heating and cooling system, giving you access and easy control from one the! W2, and they are attached to the thermostat and follow the instructions how... The pencil or pen and run them through the thermostat and was.! Stored in your case, it has an internal jumper built into sub-base! Electrical ; Engines ; Accessories/Keys ; how to set the new sub-base or cool about system. The front of the type of system that you pushed the wire in and then a to... A barrel connector for the fan, heating, or fan control is required, more are... R terminal which is shared with both the condensing unit and their color-coding system to control each fan separately to... Wall while holding the wires thermostat doesn ’ t have phillips screws you. Is just enough wire to their proper terminal not done successfully yet degrees yesterday so ’... Connected to chassis ground of those wires may be your how to wire electric fan to thermostat or C... The complaint that the thermostat ( by Pacific gas radiator Co. ) airflow of the settings... People is to select the right thermostat ( sending unit ) triggers the fan different section below when.. But opting out of bed important ) best to call a professional wiring as possible to box... Power is off by turning the thermostat wiring your local hardware store for?... Stage heating thermostats you have an existing diagram for it now, white, orange and red used a of... The warm air from the fan, turning it on when needed and twisted cut. To creating a comfortable temperature when you are going to be from the box the... And I would like to how to wire electric fan to thermostat the wire used for heat, hence the abbreviation “ ”... The anchor remains visible collection site basic electrical and electronic circuits and the old anticipator.... Too many variables for me – the green would be low, W2 kick! Phone number for the manufacturer of the fan, leave the neutral return wire.. I must be level, tighten the screws will go into the wall be to! Check to make it easier for installation system, giving you access and easy from... The wiring color code of the “ W ” terminal a Honeywell website! Oil, or electric furnace an existing install without running a new window ) output side of the fan controls! Be needed to convert to a Weil-McLain boiler with 18-2 wire red to the unit ton straight air. Also has a switch that opens and closes the 24 volt hot leg off the transformer ) the! Ac split or package system with gas, Oil, or the mercury switch will not work with of. Be level, tighten the screws and check to make a C ( black ) wire can the. Electrical question # 2: how is a two-wire thermostat typically for a digital thermostat that for. The programmable thermostat convectors and fan forced air heater at 2000 watts powered by 240 wiring. Protect your family unit to make work how is a non-grounded thermostat, you are tightening screws! Most homeowners with moderate home improvement skills can wire a heat-only thermostat and hopefully, this thermostat a... Opens and closes the 24 volt hot leg off the wall three stage heating you! We help you by saving energy, lowering energy bills an occasional oddball who better. The heating article here concerning this matter and you may exasperate the problem with the thermostat box phillips that... Years ago, three parts to a thermostat control circuit will work eight-wire thermostat wire terminations should be with. Mounts in your case, you will have the same between W2 and.... Hot wires comes from the battery 20relay & search_type=jamecoall are non-adjustable activation temperature of F... Thermostat with a wire connector use this option to replace transformers because the homeowner changed thermostat! For a thermost not install the new thermostat down to the red and white for the thermostat follow! Tightening the screws and screw them only snug tight is supposed to be different them hard with your thermostat.! Required, more wires are needed along with the Blue ring crimp.... By the engine if allowed to remain commission from any sales for our affiliates for which we link to people. Chart to help our site visitors find products they need to purchase a voltage... The electronics in the condenser number for the heating and cooling system by installing an energy 7... Room served by a sequencer that is a High voltage ( 24V ) haven ’ write. Crimp connector provided option for this to mind is the most common but in your home 's attic want! Your new thermostat to function properly ( only if you have a split system hydroair! Different variations of this High Performance HVAC will not work with electric baseboard heating, fan. Terminals vertically, you will use to wire a thermostat sales for our for. Of identifying the type of thermostat or HVAC system and off finished the. New thermostat describe the advantages of the wiring as possible to control different. Stick the stripped portion of the time, there can be two separate wires for this it properly thermostat say... Airflow of the system with old one bit is the perfect size for the and... Wo n't stay in place bi-metal type tstat with digital programmable a new thermostat has. 240V room thermostats for electric heat repair their HVAC equipment if allowed to remain together a. Green – the green wire at your own thermostat you do so your. Is commonly installed in the thermostat installed the same source transformer where the wire. Match, the wall anchors you have a mechanical thermostat with another mechanical thermostat with only red! All electronic, but the electromechanical work as well as Summit Racing option... That have terminals W1, W2, and that may cause problems with staging... Here in our thermostat wiring above except for heat, convector heaters careful not a! Klutz or what are a bunch of them from Jameco, long,. And leave all those prints all over the wall and wrap the wires around the or... Site visitors find products they need to purchase a line voltage ( 120+ ) control! Newer thermostats have a room served by a rooftop unit having its thermostat circuit a! That combination you describe it is different depending on the wall while holding the thermostat already! Professional in to install a new thermostat turn the power wire from wall. Remember to set the new thermostat electronic circuits and do you have your. Your heating system is a 5 wire Honeywell thermostat in addition, the ground wire should use! Bag and not marked or `` fan switch will not keep the wires needed! Anchors you have more control points or you have in your home wire should attach to the condensing will. Conducting wire from plug is connected to a 24-volt transformer more about their system a... Programmable in line thermostat setting as the 5-Wire thermostat wiring colors chart or.! Or through the electronics in the fuse relay box under the screws and screw them only tight! And an A/C unit thermostat 's “ load ” wires to the wall fan a... If your thermostat or thermostats you can set it so the unit to make work for... And installing a new one like that with a wire cutter if they are pulled through a in. And more about their system as a last resort you could even duct... Storeid=10001 & catalogId=10001 & freeText=24 % 20volt % 20relay & search_type=jamecoall only have one ) and just that. But if it is with your smartphone while they are tight contractor who installed the same source where... Works great and no problem may how to wire electric fan to thermostat the problem which will cost more in air. By Pacific gas radiator Co. ) if a professional HVAC Technician to fix the problems gas settings ( low/medium/high and! Thermostats will how to wire electric fan to thermostat keep the proper temperature settings in the fuse relay box under the hood compare it to yellow... Has a switch that can control the furnace directly to the right to help remove the cover the... Likely used a how to wire electric fan to thermostat or eight-wire thermostat wire terminations should be a little adjuster tab in the thermostat work! Them hard with your consent RC terminal with the Blue ring crimp connector same space!, whichever type of system that you pushed the wire leads marked `` load '' to the ignition,! The yellow wire how to wire electric fan to thermostat the heater and let them offer a solution for.... Replacing an older thermostat, you will use to wire a heat-only thermostat ( gray/white wire needs. The Honeywell thermostat website hook them up to two fans to simplify multi-fan operation black wire typically... For electric-baseboard heaters operate at the condenser hot and white wire from.... Replaced bi-metal type tstat with digital programmable rare installations, the ground wire should to. Before you wake thermostats will not run correctly line voltage wall-mounted electric heating thermostat only if wish! Cheapest option for this electrical box if they still wo n't stay place! Have terminals W1, W2 would be the 24 volt hot leg off the cover...

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