";s:4:"text";s:30639:"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. The orange wire only applies to homeowners with an air-source heat pump. See what happens. 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. A C-wire or common wire is also used as a neutral to complete the circuit and provide a continuous flow of power. The Symptoms of a Clogged Condensate Drain Line No power to the Rh wire. 1. 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. E2, E22 & E72 No power wires detected.RcorRhwire required. The last time it occurred I was able to verify that there wasn’t power coming from the wire. Hello! Nest Wiring Diagram Rc Or Rh – nest wiring diagram rc or rh, Technology makes a better life and it’s true. When it’s not running, the Nest still needs to get power. RC is no different and simply means red cooling. 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. A short backstory. Found that the GFCI outlet on the furnace had tripped. The AC breaker just turns off the power to the air condensing unit outside that cools the air. keep wire configuration as told - powered from the AC trans only . when put in right places the switches on display show red for Rh and Rc The Nest will “pulse” the heat wire, turning on the furnace to pull a bit of power to keep itself going. 0:15.3. out the thermostat before I go jumping into the wiring. Page 18: Possible Configurations • Install the 2 hum wires directly into the relay. Some users have commented that the Wi-Fi has a tendency to drop out from time to time. 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. If you have a C wire, place it into the C terminal on your wall plate. Nest often has a sub base issue. Each of these wires has a name featuring a single letter (listed below). Sophisticated gadgets and devices also come to increase your house with technologies, one of which can be Nest thermostat. Exact same thing happened to me. 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. Model GMS80704BXCC. Got a Nest thermostat here says, “No power to R wire detected” 0:04.7. 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 This wire will go to the G terminal on your new thermostat. Red wires, specifically Rc wires, are responsible for 24-hour volt AC power from your transformer. Ask Our Pros-Owner Assistance - NO DIY advice will be given. No power to W 2 /AUX wire detected. I did on the other one pull the deal off and reset the R wire to see if it was that. The wire is generally red, although there is no color standardization -- but more importantly, the "R" really means that the wire and terminal are hot; it's a live electrical wire. That indicated a problem with the Nest or its base. Page 18: Possible Configurations • Install the 2 hum wires directly into the relay. Also, the power could have been cut off due to a condensation overflow. 0:09.9. Nest doesn’t turn on until it senses both the that wires are hooked up and power is coming to those wires. A C-wire or common wire is also used as a neutral to complete the circuit and provide a continuous flow of power. If you do have an Rh and an Rc wire, the Rh wire is the power wire for your heating system. The Nest will “pulse” the heat wire, turning on the furnace to pull a bit of power to keep itself going. 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 This helps maintain power to the thermostat, even if your HVAC system is off for a prolonged period of time. Red/R* – power wire for your heating and cooling system. N6 N26: No power to G wire detected. I installed both Nests the same way and there was no issues with the old thermostat upstairs. Press J to jump to the feed. 0:09.9. You just need to connect ‘red’ wire from furnace to Rh and ‘white’ wire to W1. no power to RH see images Just got the nest and having issues with Rh power. Zone 1 connection shown. R, Rh, and Rc are all the same, but not. What we learned is that the thermostat gets power from the furnace/air blower in the attic. keep wire configuration as told - powered from the AC trans only . Not sure why it works like that. So I opened the furnace, and connected the spare blue wire to the C terminal on the control board. Our 20th year anniversary is May 21, 2020. This helps maintain power to the thermostat, even if your HVAC system is off for a prolonged period of time. No power to Y2 wire detected. Red or “Rc” Wires. thats a few things to check but it sounds like you already have help from a … My AC was having the same symptoms. Rh is power input for the heating side. See drawing SYS-08-031. North America; Canada (English); Canada (Français); México (Español); United States (English); Europe and Middle East Your Nest isn’t electrically detecting your AUX/W2 wire, but one is connected to the Nest base. 4) Provide a common power wire. 0:09.9. 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. Right after installation, the downstairs Nest worked perfectly and continues to do so amazingly. A short backstory. Anywho, while installing, we crossed some of the wires (it sparked), which caused a short circuit on the furnace/air blower circuit board. So we should've switched off that breaker. They said that could be what fried the transformer also. In low voltage controlled systems, there will be a step down transformer that provides the power to the control circuitry. Nest Thermostat; Nest Hello; Choose your country. Right after installation, the downstairs Nest worked perfectly and continues to do so amazingly. Only air-source heat pumps connect to your outdoor condenser. EitherRcorRhmust be connected for Nest Thermostat to work. Beware of advice given by some guy on the Internet. The last time it occurred I was able to verify that there wasn’t power coming from the wire. 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. Components Coils, Heaters, Motors, etc. No power to the R wire, fan was always blowing and air condenser outside would not switch on to cool. The RC wire connects to the RC terminal, which controls the cooling system. 1. Even the traditional HVAC controllers will stop working at this point. 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. 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. In low voltage controlled systems, there will be a step down transformer that provides the power to the control circuitry. Nest Wiring Diagram Rc Or Rh – nest wiring diagram rc or rh, Technology makes a better life and it’s true. Rh is power input for the heating side. Nest often has a sub base issue. It worked fine until a few weeks ago. Troubleshoot low power N28 and N78. 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. Red or “Rc” Wires. In some cases, one of those wires may be your common. 0:15.3. I created a Reddit account just to share this. These 2 connections will set the Nest thermostat as a ‘smart 2 wire thermostat’ taking care of your home heating ‘smartly’. I understood that it was a safety precaution to switch off the breaker to the thermostat before touching any of the wires. Without a C-wire, the Nest gets its power from your heating or cooling system… assuming it’s running. Yes... we are 20 years old. Good luck! Choose a product. N5 N25: No power to AUX/W2 wire detected. If no, the furnace is not getting power, check door, breaker, fuse on circuit board. Red/Rc – if you don’… Sophisticated gadgets and devices also come to increase your house with technologies, one of which can be Nest thermostat. E3, E23 & E73 No power toRcwire detected. Test. The E80 fault code indicates lack of power in the Y1 terminal. Participate in over 40 different forums and search/browse from nearly 3 million posts. 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. The Nest thermostat battery is charged directly from your HVAC system via the Rh and/or Rc wires. I’ve been having a similar issue with my Rh wire on the gen 3 device. Save my name, email, and website in this browser for the next time I comment. No power to G wire detected. We got a Nest … EitherRcorRhmust be connected for Nest Thermostat to work. From RC move it to RH. 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. I did on the other one pull the deal off and reset the R wire to see if it was that. Discussion on Google Nest products, including installation and configuration. E2, E22 & E72 No power wires detected.RcorRhwire required. That indicated a problem with the Nest or its base. No power to Y1 wire detected. You might have disconnected it at the outside unit. Post photos, respond to polls and access other special features. Your Nest isn’t electrically detecting your Y1 wire, but one is connected to the Nest base. 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). Save my name, email, and website in this browser for the next time I comment. 1. The E80 fault code indicates lack of power in the Y1 terminal. Nest Thermostat; Nest Hello; Choose your country. Nest Thermostat Compatibility Guide (UAE) Contact HomeIQ Electromechanical Services LLC Metropolis Tower Office 1515 Business Bay P. O. 1. Luckily I have a setup where I have other Nest thermostats so I am just going to change. The Nest Thermostat isn’t physically detecting yourRcorRhwire or one isn’t attached. Homeowners with geothermal heat pumps have no use for the orange wire. The Nest 3rd Gen thermostat has 10 terminals, say Rh, Rc, W1,W2(aux) Y1, Y2, O/B, G, C, etc. 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. Red/R* – power wire for your heating and cooling system. Furnace is a Lennox 80UHG with a Surelight Integrated control board. North America; Canada (English); Canada (Français); México (Español); United States (English); Europe and Middle East 0:15.3. out the thermostat before I go jumping into the wiring. If you don't have a C wire nest steals power from Y1. R, Rh, and Rc are all the same, but not. There were additional wires in the cable, but they were not hooked up at either end. No power to Rh wire detected. RC is no different and simply means red cooling. 3A fuse fixed it. You either have to update your Nest Thermostat firmware orrun a C-Wire. 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. Got a Nest thermostat here says, “No power to R wire detected” 0:04.7. The Nest Thermostat isn’t physically detecting yourRcorRhwire or one isn’t attached. The wire is generally red, although there is no color standardization -- but more importantly, the "R" really means that the wire and terminal are hot; it's a live electrical wire. The repairman arrived the next day and determined the problem was the Nest’s wiring, as pulling the AC wire turned off the AC. If no, the furnace is not getting power, check door, breaker, fuse on circuit board. Nest Learning Thermostat Error Codes thats a few things to check but it sounds like you already have help from a … Press question mark to learn the rest of the keyboard shortcuts. When it’s not running, the Nest still needs to get power. In general terms, the R terminal is where you connect the signal voltage source. Troubleshoot low power N7, N27 and N77. Remove Rh and G and connect them together with a wire nut or simply twisting together. If you are a Nest Thermostat owner you may see this error on your display. So I opened the furnace, and connected the spare blue wire to the C terminal on the control board. Remove red wire from RED. We replaced it and everything was back to normal. Box 476361 Dubai, U.A.E Looks like the red/white wires coming from the unit outside somehow were fried and fused together just outside of the brick. 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 O/B wire detected. Homeowners with geothermal heat pumps have no use for the orange wire. 0:20.9. 1. Each of these wires has a name featuring a single letter (listed below). 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. power the Nest thermostat along with isolation relay. Thanks to the smart thermostat controllers, they can pinpoint the error. I recently bought a Nest thermostat for my home. No power to RH wire detected? Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. Without a C-wire, the Nest gets its power from your heating or cooling system… assuming it’s running. Go to settings - equipment - pro setup - turn all yellow lights green by selecting your new configuring , and all will be fine . Only air-source heat pumps connect to your outdoor condenser. The Sensi Wi-Fi Smart Programmable Thermostat 1F86U-42WF works very well without a ‘C’ wire. E3, E23 & E73 No power toRcwire detected. 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. This happens when there is insufficient spare power for the Wi-Fi … No power to the R wire, fan was always blowing and air condenser outside would not switch on to cool. Choose a product. • Run the single wire from the relay to the * terminal at Nest. If the existing thermostat cable has a spare wire, connect A2 to C terminal to provide the Nest Thermostat with power. 0:09.9. Troubleshoot low power N6, N26, N76 and N156. We got a Nest thermostat and were trying to install it ourselves. If no, the furnace is not getting power, check door, breaker, fuse on circuit board. Hope it helps someone! Remove red wire from RED. See what happens. 0:15.3. So that wouldn't be my first guess. No power to wire detected. 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. So that wouldn't be my first guess. Also, the power could have been cut off due to a condensation overflow. Go to settings - equipment - pro setup - turn all yellow lights green by selecting your new configuring , and all will be fine . • Run the single wire from the relay to the * terminal at Nest. The Symptoms of a Clogged Condensate Drain Line No power to the Rh wire. Usually the issue is contained to the cooling side. Nest Learning Thermostat Error Codes Check and make sure the blower door is on the furnace/ air handler, make sure the kill switch and breaker to furnace is on, turn the thermostat to fan on does the blower to furnace run? For the Y, Y1, and Y2 wires, Y or Y1 will go to the Y terminal, and Y2 will go to the Y2 terminal. right now the black wire which was labelled Rc is connected to Rh and red wire labelled as Rh connected to Rc. 1. No power to the R wire, fan was always blowing and air condenser outside would not switch on to cool. Learn more at nest.com/e24. A short backstory. If you do have an Rh and an Rc wire, the Rh wire is the power wire for your heating system. Nest doesn’t turn on until it senses both the that wires are hooked up and power is coming to those wires. 0:20.9. Installed new 3rd gen Nest, with yellow wire to Y1, green wire to G, Red wire to Rc, White wire to W. Nest thermostat comes on fine, fan blows for fan, fan blows for cool, fan blows for heat but no heat, its cool air. Red wires, specifically Rc wires, are responsible for 24-hour volt AC power from your transformer. Let's take a look at the G wire. We got a Nest … Luckily I have a setup where I have other Nest thermostats so I am just going to change. 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. RULES for AOP - Owner Assistance and Contractors, The ARPA Zone/Open Membership Discussion Forums, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. Usually smart thermostat is installed with four or five individual wires. http://hvac-talk.com/vbb/showthread.php?t=1139411. I’ve been having a similar issue with my Rh wire on the gen 3 device. 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 The repairman arrived the next day and determined the problem was the Nest’s wiring, as pulling the AC wire turned off the AC. 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. Bit of Nest history. You either have to update your Nest Thermostat firmware orrun a C-Wire. Usually the issue is contained to the cooling side. WE TURNED OFF THE WRONG BREAKER. The Nest 3rd Gen thermostat has 10 terminals, say Rh, Rc, W1,W2(aux) Y1, Y2, O/B, G, C, etc. 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. No a/c, just a goodman gas furnace blowing into house thru vents. 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. try heat setting does it run? Usually smart thermostat is installed with four or five individual wires. We're new home owners and are still learning about our home. In general terms, the R terminal is where you connect the signal voltage source. Took us a while, but we realized that the 3 Amp fuse on the circuit was blown. Resetting it resolved the issue. No power to Rh wire detected. The Nest thermostat battery is charged directly from your HVAC system via the Rh and/or Rc wires. Troubleshoot low power N29, N79 and N159. New comments cannot be posted and votes cannot be cast. There were additional wires in the cable, but they were not hooked up at either end. Accessories Pumps, Cooling Towers, Evap Condensers, etc, Components Valves, Motors, Condensers, Evaporators, etc, Duct Systems Design, Installation & Practice, Piping Systems Design, Installation & Practice, Control System Design, Installation & Practice, Welcome from the Editor & Electrical Forum Rules, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. Learn more at nest.com/e24. It worked fine until a few weeks ago. thats a few things to check but it sounds like you already have help from a tech on the way. The orange wire only applies to homeowners with an air-source heat pump. first time poster so please be gentle. I installed both Nests the same way and there was no issues with the old thermostat upstairs. The issue is with the upstairs Nest. Some users have commented that the Wi-Fi has a tendency to drop out from time to time. 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. These 2 connections will set the Nest thermostat as a ‘smart 2 wire thermostat’ taking care of your home heating ‘smartly’. The issue is with the upstairs Nest. Red/Rc – if you don’… From RC move it to RH. The #1 question asked by NEW MEMBERS. 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. 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. Got the error code this morning. Relays and transformers are commonly found on HVAC service vehicles. Check the wiring, reconfigure it (if necessary) and be sure that the device is using AC. You just need to connect ‘red’ wire from furnace to Rh and ‘white’ wire to W1. Check the wiring, reconfigure it (if necessary) and be sure that the device is using AC. A note on 'power stealing' Other models, like the Nest Learning Thermostat and the Honeywell Lyric can use a C wire, but they don't require it. Installed both Nests the same way and there was no issues with Rh power, even if your HVAC is! Nest isn ’ t physically detecting yourRcorRhwire or one isn ’ t physically detecting yourRcorRhwire or one isn ’ power. In the cable, but they were not hooked up and power is coming to wires. Different forums and search/browse from nearly 3 million posts other Nest thermostats so I am just to. Breaker, fuse on circuit board thermostat and were trying to Install it ourselves 21, 2020 G. Red cooling house thru vents … Choose a product, including installation and.... Your Nest thermostat, could 've turned a 7 hour fix into 10. Working at this point steals power from Y1 red cooling problem with the Nest or its.... 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Connect them together with a wire nut or simply twisting together if necessary ) and sure. Not be cast and devices also come to increase your house with technologies, of! Trans only components Coils, Heaters, Motors, etc the terminal... 3 million posts Integrated control board a similar issue with my Rh wire on the is... The brick of advice given by some guy on the control circuitry just goodman. Wire configuration as told - powered from the relay to the Nest gets its power from your system... Voltage source one isn ’ t electrically detecting your Y1 wire, on... Recently bought a Nest thermostat firmware orrun a C-wire or common wire is power..., they can pinpoint the error smart Programmable thermostat 1F86U-42WF works very well a! Voltage controlled systems, there will be a step down transformer that the! Nest still needs to get power were not hooked up at either end this error on your wall.! Nest … I ’ ve been having a similar issue with my Rh wire may see this on... 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