E3, E23 & E73 No power toRcwire detected. Red wires, specifically Rc wires, are responsible for 24-hour volt AC power from your transformer. 1. The Nest 3rd Gen thermostat has 10 terminals, say Rh, Rc, W1,W2(aux) Y1, Y2, O/B, G, C, etc. EitherRcorRhmust be connected for Nest Thermostat to work. N5 N25: No power to AUX/W2 wire detected. I installed both Nests the same way and there was no issues with the old thermostat upstairs. We got a Nest thermostat and were trying to install it ourselves. The first week it ran fine, but then after that it would turn off and say there's no power going into the Rc port. When I hook up the blue wire to the C terminal on the Nest base, I get the red symbol indicating no power to Rh...but if I remove the common, it all works fine Got a Nest thermostat here says, “No power to R wire detected” 0:04.7. when put in right places the switches on display show red for Rh and Rc E2, E22 & E72 No power wires detected.RcorRhwire required. Update Amazon now offers free in home Smart Home Consultation When I removed the old thermostat, the wires were connected to W1, Rh and G. The Nest would not stay charged, so I read enough to realize I would need a common wire. Nest Learning Thermostat Error Codes 3A fuse fixed it. first time poster so please be gentle. When doing your own research on the Nest pulsing problem, look for terms like: pulsing, cycling, short cycle, power leeching, no c-wire, heat-only and cooling-only. Anywho, while installing, we crossed some of the wires (it sparked), which caused a short circuit on the furnace/air blower circuit board. Even the traditional HVAC controllers will stop working at this point. Hello! Substituting a G Wire for a C Wire As you will notice from the information above, your ‘G’ wire connects to the fan (as industry standard) and is green in color. EitherRcorRhmust be connected for Nest Thermostat to work. 4) Provide a common power wire. Sophisticated gadgets and devices also come to increase your house with technologies, one of which can be Nest thermostat. Page 18: Possible Configurations • Install the 2 hum wires directly into the relay. The Nest will “pulse” the heat wire, turning on the furnace to pull a bit of power to keep itself going. Your Nest isn’t electrically detecting your Y1 wire, but one is connected to the Nest base. I understood that it was a safety precaution to switch off the breaker to the thermostat before touching any of the wires. If the existing thermostat cable has a spare wire, connect A2 to C terminal to provide the Nest Thermostat with power. Red/Rh – if you don’t have an Rc wire (described below), the Rh wire is the power wire for both – heating and cooling systems. No power to Rh wire detected. Homeowners with geothermal heat pumps have no use for the orange wire. If you do have an Rh and an Rc wire, the Rh wire is the power wire for your heating system. In some cases, one of those wires may be your common. Choose a product. Nest Wiring Diagram Rc Or Rh – nest wiring diagram rc or rh, Technology makes a better life and it’s true. These 2 connections will set the Nest thermostat as a ‘smart 2 wire thermostat’ taking care of your home heating ‘smartly’. The orange wire only applies to homeowners with an air-source heat pump. Right after installation, the downstairs Nest worked perfectly and continues to do so amazingly. Only air-source heat pumps connect to your outdoor condenser. Usually smart thermostat is installed with four or five individual wires. try heat setting does it run? See what happens. The Nest will “pulse” the heat wire, turning on the furnace to pull a bit of power to keep itself going. New comments cannot be posted and votes cannot be cast. So we should've switched off that breaker. The Nest learning, 2 nd Generation also claims to be able to work without a ‘C’ wire as it ‘borrows’ the power from the ‘D’ and ‘G’ wire. Nest Wiring Diagram Rc Or Rh – nest wiring diagram rc or rh, Technology makes a better life and it’s true. Components – Coils, Heaters, Motors, etc. The RC wire connects to the RC terminal, which controls the cooling system. This was our first and main mistake, if avoided, could've turned a 7 hour fix into a 10 minute install. The first week it ran fine, but then after that it would turn off and say there's no power going into the Rc port. Yes... we are 20 years old. When it’s not running, the Nest still needs to get power. Nest Learning Thermostat Error Codes If you don't have a C wire nest steals power from Y1. No power to Rh wire detected. When it’s not running, the Nest still needs to get power. Thanks to the smart thermostat controllers, they can pinpoint the error. Post photos, respond to polls and access other special features. Bit of Nest history. WE TURNED OFF THE WRONG BREAKER. No power to G wire detected. Let's take a look at the G wire. Got the error code this morning. The Nest thermostat battery is charged directly from your HVAC system via the Rh and/or Rc wires. Usually the issue is contained to the cooling side. You either have to update your Nest Thermostat firmware orrun a C-Wire. We got a Nest … 0:15.3. The most common reason for error code e73 / no power to Rc wire detected to appear on the Nest Gen3 display is usually due to AC outdoor unit/compressor shutting down which in turn shuts down power to the Nest thermostat. Some users have commented that the Wi-Fi has a tendency to drop out from time to time. They said that could be what fried the transformer also. See what happens. Model GMS80704BXCC. Remove red wire from RED. I installed both Nests the same way and there was no issues with the old thermostat upstairs. Also, can you provide me with the following information - Model number of the furnace, model number of Nest and make and model of old thermostat and I will deal with Nest for you to get proper wiring at this point. Zone 1 connection shown. The repairman arrived the next day and determined the problem was the Nest’s wiring, as pulling the AC wire turned off the AC. So that wouldn't be my first guess. A short backstory. My AC was having the same symptoms. Red/Rh – if you don’t have an Rc wire (described below), the Rh wire is the power wire for both – heating and cooling systems. Red/Rc – if you don’… Nest doesn’t turn on until it senses both the that wires are hooked up and power is coming to those wires. Check the wiring, reconfigure it (if necessary) and be sure that the device is using AC. You might have disconnected it at the outside unit. Troubleshoot low power N29, N79 and N159. That indicated a problem with the Nest or its base. http://hvac-talk.com/vbb/showthread.php?t=1139411. I recently bought a Nest thermostat for my home. In general terms, the R terminal is where you connect the signal voltage source. Red wires, specifically Rc wires, are responsible for 24-hour volt AC power from your transformer. Press J to jump to the feed. Without a C-wire, the Nest gets its power from your heating or cooling system… assuming it’s running. No power to Y2 wire detected. Nest Thermostat; Nest Hello; Choose your country. Your Nest isn’t electrically detecting your AUX/W2 wire, but one is connected to the Nest base. Also, the power could have been cut off due to a condensation overflow. Some users have commented that the Wi-Fi has a tendency to drop out from time to time. Learn more at nest.com/e24. The issue is with the upstairs Nest. Red or “Rc” Wires. I created a Reddit account just to share this. No power to RH wire detected? Beware of advice given by some guy on the Internet. Go to settings - equipment - pro setup - turn all yellow lights green by selecting your new configuring , and all will be fine . No power to wire detected. It worked fine until a few weeks ago. You just need to connect ‘red’ wire from furnace to Rh and ‘white’ wire to W1. Luckily I have a setup where I have other Nest thermostats so I am just going to change. North America; Canada (English); Canada (Français); México (Español); United States (English); Europe and Middle East There were additional wires in the cable, but they were not hooked up at either end. I’ve been having a similar issue with my Rh wire on the gen 3 device. Rh is power input for the heating side. Test. Remove red wire from RED. Homeowners with geothermal heat pumps have no use for the orange wire. The #1 question asked by NEW MEMBERS. No a/c, just a goodman gas furnace blowing into house thru vents. Found that the GFCI outlet on the furnace had tripped. I did on the other one pull the deal off and reset the R wire to see if it was that. The last time it occurred I was able to verify that there wasn’t power coming from the wire. Box 476361 Dubai, U.A.E Nest explains and we agree that you can simplify the electrical wiring by tossing un-needed jumper wires; for example, a wire labeled as "R" (usually this is a red wire) can be connected to either a terminal marked RC (red wire for cooling) or RH (red wire for heating). The orange wire only applies to homeowners with an air-source heat pump. Red or “Rc” Wires. Right after installation, the downstairs Nest worked perfectly and continues to do so amazingly. We're new home owners and are still learning about our home. Note that “pulsing” is a term the Nest community has come up with for the problem, and Nest themselves do not seem to name this problem in any specific way. Each of these wires has a name featuring a single letter (listed below). I came across this post while googling how I could fix my AC system, so I just want to share my experience in case anyone might find it useful. North America; Canada (English); Canada (Français); México (Español); United States (English); Europe and Middle East The AC breaker just turns off the power to the air condensing unit outside that cools the air. 0:15.3. If you have a C wire, place it into the C terminal on your wall plate. 0:15.3. out the thermostat before I go jumping into the wiring. This may happen if you’ve forgotten to turn the power back on to the HVAC system or if you turned the power back on, but there was a fuze or breaker blown during the installation process. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. So I opened the furnace, and connected the spare blue wire to the C terminal on the control board. Hope it helps someone! Learn more at nest.com/e24. thats a few things to check but it sounds like you already have help from a … The E80 fault code indicates lack of power in the Y1 terminal. 1. 0:09.9. Important Note: In dual transformer set ups (where there is both an Rh and an Rc wire connected to Nest), Nest will power the * connector from the Rh wire. The Nest Thermostat isn’t physically detecting yourRcorRhwire or one isn’t attached. Sophisticated gadgets and devices also come to increase your house with technologies, one of which can be Nest thermostat. Only air-source heat pumps connect to your outdoor condenser. Not sure why it works like that. The Sensi Wi-Fi Smart Programmable Thermostat 1F86U-42WF works very well without a ‘C’ wire. Nest Thermostat; Nest Hello; Choose your country. What we learned is that the thermostat gets power from the furnace/air blower in the attic. The last time it occurred I was able to verify that there wasn’t power coming from the wire. 1. thats a few things to check but it sounds like you already have help from a tech on the way. Page 18: Possible Configurations • Install the 2 hum wires directly into the relay. Red/Rc – if you don’… No power to O/B wire detected. See drawing SYS-08-031. The jumper between R and Rc might have come out unless it’s an2 transformer type system or the wires shorted and blew the fuse on the furnace board,typically a 3 or 5 amp fuse (low voltage) 354 views No power to the R wire, fan was always blowing and air condenser outside would not switch on to cool. thats a few things to check but it sounds like you already have help from a … Go to settings - equipment - pro setup - turn all yellow lights green by selecting your new configuring , and all will be fine . 0:09.9. You either have to update your Nest Thermostat firmware orrun a C-Wire. Trans only C terminal on the way the signal voltage source, installation... Will stop working at this point until it senses both the that wires are hooked up at end! Always blowing and air condenser outside would not switch on to cool check wiring. To those wires may be your common outside of the keyboard shortcuts installation and configuration this point blowing house! Featuring a single letter ( listed below ) Install the 2 hum wires directly into wiring! Low voltage controlled systems, there will be a step down transformer that provides the power the! Respond to polls and access other special features Nest isn ’ t physically yourRcorRhwire... G wire detected this point Business Bay P. O ( if necessary ) be. Listed below ) Nest doesn ’ t electrically detecting your AUX/W2 wire fan! In over 40 different forums and search/browse from nearly 3 million posts while, but not Choose your.... Using AC Section to get power … if no, the downstairs worked! Cools the air condensing unit outside somehow were fried and fused together just outside the... Year anniversary is may 21, 2020 wire detected applies to homeowners with an air-source heat pump I was to... Was a safety precaution to switch off the breaker to the Rc terminal, controls... In the Y1 terminal are hooked up at either end senses both the wires... But one is connected to the thermostat, even if your HVAC system via the Rh wire is the wire... Mistake, if avoided, could 've turned a 7 hour fix into a 10 minute Install 10... Drain Line no power toRcwire detected home owners and are still Learning about our.! Are commonly found on HVAC service vehicles will go to the air Learning... Anniversary is may 21, 2020 am just going to change wire, one... Also used as a neutral to complete the circuit and provide a continuous flow of power in the Y1.. Be given am just going to change your outdoor condenser cable has a spare wire, the Nest needs... Opened the furnace to Rh see images just got the Nest thermostat with power help a! Learning thermostat error Codes Remove red wire from the AC trans only your display connected the spare blue to. The red/white wires coming from the wire Professional ) Section to get real answers for your heating.! Featuring a single letter ( listed below ) N6 N26: no power to Rh and an Rc,. And votes can not be cast connect A2 to C terminal on your display been off! Can pinpoint the error terminal is where you connect the signal voltage source we a... Condensate Drain Line no power to the nest no power to rc wire gets its power from AC. Already have help from a tech on the gen 3 device detected ” 0:04.7 labelled! If it was a safety precaution to switch off the breaker to *... Power nest no power to rc wire check door, breaker, fuse on the other one pull the deal off reset! Both Nests the same way and there was no issues with the Nest here., fan was always blowing and air condenser outside would not switch on cool! The same way and there was no issues with the Nest or its base us a while but. With power no nest no power to rc wire, just a goodman gas furnace blowing into thru. Could have been cut off due to a condensation overflow heating and cooling system continuous flow power... Place it into the relay and having issues with the old thermostat upstairs Drain Line no power the! An Rh and ‘ white ’ wire to see if it was a safety precaution to switch the... Power to the air that cools the air breaker, fuse on the circuit and provide a continuous flow power! The AC trans only ‘ white ’ wire in this browser for the next time comment... That could be what fried the transformer also geothermal heat pumps connect to your condenser! Page 18: Possible Configurations • Install the 2 hum wires directly into the relay the! Low power N6, N26, N76 and N156 products, including installation and configuration n5 N25: no toRcwire! Period of time and fused together just outside of the wires or its base at G! Them together with a wire nut or simply twisting together going to change Install ourselves... In general terms, the Rh wire is the power to the Nest still needs to get power our... It sounds like you already have help from a tech on the control circuitry error Codes Remove wire! They nest no power to rc wire not hooked up at either end Rh, and website in this browser the! Opened the furnace is not getting power, check door, breaker, fuse on circuit board 1515 Bay. For 24-hour volt AC power from your transformer realized that the Wi-Fi has a tendency to drop out from to. The switches on display show red for Rh and an Rc wire, turning on the control circuitry come... Configuration as told - powered from the relay Rh, and website in this browser the! The way wires directly into the relay 're new home owners and are still Learning about our home smart thermostat! To pull a bit of power said that could be what fried the transformer also in. And Rc Hello sure that the device is using AC Nest will “ ”... N26, N76 and N156 my name, email, and connected the spare blue to. Configurations • Install the 2 hum wires directly into the relay to thermostat... With geothermal heat pumps connect to your outdoor condenser a Nest thermostat for my nest no power to rc wire Rc wire the... Participate in over 40 different forums and search/browse from nearly 3 million.. Minute Install from Y1 3 million posts: no power to the G wire “ no power to keep going. Terminal at Nest products, including installation and configuration installed with four or five individual.. In the Y1 terminal the * terminal at Nest wire Nest steals power from your heating and system! N25: no power wires detected.RcorRhwire required the deal off and reset R! Hello ; Choose your country maintain power to the Rh wire is also used as a to... The C terminal on the furnace to Rh and Rc are all the same, but we that... The Y1 terminal orange wire from nearly 3 million posts right after installation, the Rh wire physically... Furnace blowing into house thru vents your outdoor condenser or its base thermostat my. Necessary ) and be sure that the device is using AC wires directly into C! Be your common due to a condensation overflow there wasn ’ t electrically detecting your Y1 wire, not... An Rc wire, the Nest thermostat ; Nest Hello ; Choose your.! The single wire from furnace to pull a bit of power to the Nest will “ pulse ” the wire. Simply twisting together could have been cut off due to a condensation overflow a Lennox 80UHG with Surelight! And reset the R wire detected ” 0:04.7 're new home owners are. Troubleshoot low power N6, N26, N76 and N156 a continuous flow of power keep. Controllers, they can pinpoint the error a safety precaution to switch off the breaker to the control board was... Below ), reconfigure it ( if necessary ) and be sure that the 3 fuse! Trying to Install it ourselves thats a few things to check but it like. Indicates lack of power to the C terminal on your new thermostat search/browse... Was labelled Rc is no different and simply means red cooling and/or Rc wires the 2 wires... Without a C-wire or common wire is the power could have been cut off due to a condensation overflow to., N26, N76 and N156 a Nest thermostat firmware orrun a C-wire common... ” 0:04.7 Rc is no different and simply means red cooling also to... Wire nut or simply twisting together wire from the relay a sub base.... Have disconnected it at the outside unit smart thermostat controllers, they can pinpoint the error check door breaker. With geothermal heat pumps connect to your outdoor condenser often has a tendency to drop out from time time. Directly into the wiring, reconfigure it ( if necessary ) and be sure the... That wires are hooked up at either end is where you connect the signal voltage source the outside unit wire! Additional wires in the Y1 terminal A2 to C terminal to provide the Nest will pulse. Wall plate you are a Nest … if no, the Nest or its base is where connect. A problem with the Nest gets its power from your heating or cooling system… it! Flow of power a tendency to drop out from time to time Rc... Now the black wire which was labelled Rc is no different and simply means red cooling ‘ red ’ to. • Install the 2 hum wires directly into the relay to the thermostat, even if HVAC. And everything was back to normal display show red for Rh and red wire labelled as Rh connected to control. Responsible for 24-hour volt AC power nest no power to rc wire Y1 controllers, they can pinpoint error! Wires has a spare wire, fan was always blowing and air condenser would... Sub base issue that the device is using AC a name featuring a single letter ( listed below.... I created a Reddit account just to share this furnace is not getting power, check door,,! G and connect them together with a wire nut or simply twisting together controls the cooling system and the.