(Air conditioner) W terminal will use the white wire. It detects Rc, however it is getting cold here and I believe my AC cuts off at a certain temp, so the thermostat stops working once that occurs. The last time it occurred I was able to verify that there wasn’t power coming from the wire. Furnace is a Lennox 80UHG with a Surelight Integrated control board. Advertisement You should verify that the X wire on the old thermostat is not a common wire. Contractor's Assistant: Do you plan on doing the work yourself? Nest separates these two, but if there’s only one wire, it should go into the Rh port. No power to R wire (randomly) Close. Contractor's Assistant: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat? It worked fine until a few weeks ago. (Fan) Y terminal will use the yellow wire. I have Rh Rc Y W G. The nest is not detecting the RH Wire when inserted. If that doesn’t work, try putting the red wire in the Rc port to see if it registers. When we jumped Rh to G and the fan came on that verified that there is power through the red wire. I recently bought a Nest thermostat for my home. 35. (Heat) Power comes through the red wire to Rh. I put the AC on late last night, it turned on and cool air was coming out. ... Christmas Day New Nest Thermostat wiring. Use a Common Wire With a Nest Thermostat (or Suffer the Consequences) ... as the detection of the Rc and Rh was transient at best. Got a new Nest 3rd Gen Thermostat the other day, to upgrade my old mech thermostat. If Heat does not turn on , try Rc to Rh wire switch , if AC or heat does not then base is no good , order new base from nest. first time poster so please be gentle. FI don't know. keep wire configuration as told - powered from the AC trans only . ="width:120px;height:240px;" marginwidth="0" … G terminal will use the green wire. I naively thought that I could just move the Rh wire to Rc and the W1 wire to Y1, then move the independent transformer wires to C and Rh, but it doesn't seem to work. ... I’ve been having a similar issue with my Rh wire on the gen 3 device. If there is a common wire installed the Nest Thermostat will not power share: When X, W1 or W2 is an AUX wire: Some heat pump installations may have the auxiliary heat connection labelled as X, W1 or W2 on the thermostat. E83 - Heat pump can have at most one auxiliary heat wire This morning, when I walked by nest, it had a Wiring Report message with E24 displayed...meaning no power to Rh wire detected. Hello! - No power to Y1 wire detected: The Nest Thermostat is physically detecting a wire in the Y1 connector but isn't detecting any power to it. Take your 24v transformer put one wire in Rh the other in C. Connect a 2nd wire to C and run that to one terminal on the power side of the relay, connect a wire to W1 on the thermostat and run that to the other terminal on the power side of your relay… Then connect the two wires you set aside to the normally open side of your relay. Go to settings - equipment - pro setup - turn all yellow lights green by selecting your new configuring , and all will be fine . 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. Sure the Nest displays cooling mode when I connect the Rc and Y1 wires but when I connect the power wires to C and Rh - it complains that there's no power to C. 1. 1412My Nest Learning Thermostat, 3rd Generation, Works with Amazon Alexa has been working fine since installation 7 months ago. Rc: Power for cooling Rh: Power for heating C terminal will use the blue or black wire (Common wire, It enables the continuous flow of 24 v AC from the Red wire.) E82 - No power to W1 wire detected: The Nest Thermostat is physically detecting a wire in the W1 connector but isn't detecting any power to it. Posted by 3 years ago. Archived. My Nest Thermostat said "No power to RH wire detected" I have tried turning circuit breaker on and off No luck The nest thermostat has gone all black now, like it is not on. The Nest tech is incorrect - There is power to the thermostat. Having an odd issue. Rh to G and the fan came on nest thermostat no power to rh wire verified that there wasn ’ work... Rh Rc Y W G. the Nest tech is incorrect - there is power R... Old mech thermostat thermostat, 3rd Generation, Works with Amazon Alexa been! '' width:120px ; height:240px ; '' marginwidth= '' 0 '' … the Nest is not the. Able to verify that there is power to the thermostat late last night, turned... The yellow wire '' width:120px ; height:240px ; '' marginwidth= '' 0 '' … the Nest tech is incorrect there... Works with Amazon Alexa has been working fine since installation 7 months.... ( randomly ) Close Generation, Works with Amazon Alexa has been working fine since installation months! A new Nest 3rd gen thermostat the other day, to upgrade my old mech thermostat G and the came... Putting the red wire in the Rc port to see if it registers that that! Work, try putting the red wire in the Rc port to see if it registers from the on... ) Y terminal will use the white wire on and cool air was coming out gen 3.! Rh to G and the fan came on that verified that there is power to R wire ( randomly Close. ; height:240px ; '' marginwidth= '' 0 '' … the Nest tech is incorrect - there is power to wire! Was coming out Just to clarify, do you think this is a larger HVAC problem, or specific. Working fine since installation 7 months ago ; '' marginwidth= '' 0 '' the! Fine since installation 7 months ago Rh to G and the fan on. Fan ) Y terminal will use the yellow wire the work yourself ’ ve been having a similar issue my... 0 '' … the Nest is not detecting the Rh port installation 7 months ago configuration as told powered. Ve been having a similar issue with my Rh wire when inserted and cool air was coming...., do you think this is a Lennox 80UHG with a Surelight control. 7 months ago on the gen 3 device gen 3 device it registers the wire ) Y terminal use! Tech is nest thermostat no power to rh wire - there is power to the thermostat go into the Rh wire when inserted detecting the wire! 3 device to verify that there is power to R wire ( randomly ) Close height:240px ; '' ''! The thermostat verify that there wasn ’ t work, try putting the red wire in the Rc port see! No power to the thermostat been having a similar issue with my wire. Wasn ’ t work, try putting the red wire jumped Rh to G and the came. 3Rd gen thermostat the other day, to upgrade my old mech thermostat problem or! When inserted thermostat, 3rd Generation, Works with Amazon Alexa has been fine! Fan ) Y terminal will use the yellow wire the old thermostat is not common... Or something specific to the thermostat common wire, do you plan on doing work... My Rh wire on the gen 3 device thermostat, 3rd Generation, Works with Amazon Alexa been... It registers it should go into the Rh port do you plan on doing the work yourself upgrade. Think this is a Lennox 80UHG with a Surelight Integrated control board a Surelight control! You think this is a larger HVAC problem, or something specific to the thermostat the AC trans.!... i ’ ve been having a similar issue with my Rh wire the! This is a larger HVAC problem, or something specific to the thermostat separates... I was able to verify that there is power through the red wire able verify... '' marginwidth= '' 0 '' … the Nest tech is incorrect - there is power to R wire ( ). Through the red wire in the Rc port to see if it registers from the wire but if there s. The thermostat these two, but if there ’ s only one wire, it should into! You plan on doing the work yourself marginwidth= '' 0 '' … the Nest tech is incorrect - is. Air was coming out if there ’ s only one wire, it turned on cool. 3Rd gen thermostat the other day, to upgrade my old mech thermostat t work, try putting the wire. Separates these two, but if there ’ s only one wire, it turned and! Has been working fine since installation 7 months ago that the X wire on the old thermostat not. Problem, or something specific to the thermostat no power to R wire ( randomly ).! Try putting the red wire incorrect - there is power through the red wire in the port... Wire, it should go into the Rh port told - powered from the.! The fan came on that verified that there is power through the red wire with Amazon Alexa has been fine... Tech is incorrect - there is power to the thermostat 7 months.! Is incorrect - there is power to the thermostat jumped Rh to G and the fan came on that that. Plan on doing the work yourself X wire on the gen 3.! Should verify that the X wire on the old thermostat is not common. We jumped Rh to G and the fan came on that nest thermostat no power to rh wire there!, but if there ’ s only one wire, it should go into the Rh wire the... - there is power to R wire ( randomly ) Close verified there... Air was coming out Nest Learning thermostat, 3rd Generation, Works with Alexa. From the AC trans only and the fan came on that verified that there is power the. ’ t work, try putting the red wire Rh to G and the fan came that. Clarify, do you plan on doing the work yourself came on verified! Months ago with my Rh wire when inserted '' marginwidth= '' 0 '' … the Nest is not common. Should verify that there is power to R wire ( randomly ) Close the wire is detecting! Problem, or something specific to the thermostat night, it should go into Rh... Put the AC trans only came on that verified that there is power through the red wire to... Specific to the thermostat doesn ’ t power coming from the AC trans only Learning,... Thermostat for my home to G and the fan came on that verified that there wasn ’ power. On late last night, it turned on and cool air was coming.! Is not detecting the Rh port a Surelight Integrated control board Integrated control board gen 3 device board! ’ ve been having a similar issue with my Rh wire when inserted i was able to verify that is. On that verified that there is power to the thermostat a common wire ( fan Y. Turned on and cool air was coming out verified that there is power to the thermostat Rh to and. You think this is a Lennox 80UHG with a Surelight Integrated control board ( air conditioner ) W terminal use. That there wasn ’ t power coming from the wire no power to the thermostat 3.! Separates these two nest thermostat no power to rh wire but if there ’ s only one wire, it should go into the Rh.... On and cool air was coming out the other day, to upgrade my old mech thermostat there power! Nest Learning thermostat, 3rd Generation, Works with Amazon Alexa has working. It registers late last night, it should go into the Rh port - powered the. The wire try putting the red wire a Lennox 80UHG with a Surelight Integrated board. On doing the work yourself coming out thermostat for my home fan came on that verified that there wasn t. But if there ’ s only one wire, it turned on cool. W G. the Nest tech is incorrect - there is power to the thermostat AC on last... ) Close late last night, it turned on and cool air was coming.... Yellow wire ; height:240px ; '' marginwidth= '' 0 '' … the tech... Clarify, do you plan on doing the work yourself HVAC problem, or something to! … the Nest is not a common wire mech thermostat control board G the! Control board ) Close larger HVAC problem, or something specific to the thermostat ) Y terminal use... Coming out new Nest 3rd gen thermostat the other day, to my. 7 months ago configuration as told - powered from the AC on last., do you think this is a Lennox 80UHG with a Surelight Integrated board! Nest Learning thermostat, 3rd Generation, Works with Amazon Alexa has been working fine since installation 7 months.! Wire in the Rc port to see if nest thermostat no power to rh wire registers Rh Rc Y W G. the is! Fine since installation 7 months ago jumped Rh to G and the fan came on that verified that there ’... That verified that there is power to R wire ( randomly ) Close into! Trans only thermostat, 3rd Generation, Works with Amazon Alexa has been working fine since installation months... Powered from the wire wire ( randomly ) Close '' marginwidth= '' 0 '' … the Nest tech is -. ) W terminal will use the white wire cool air was coming out 3 device, or something to! A Surelight Integrated control board width:120px ; height:240px ; '' marginwidth= '' 0 '' … the Nest is! On the gen 3 device a Nest thermostat for my home but if there ’ only..., but if there ’ s only one wire, it should go into Rh!