Press J to jump to the feed. Checked the app at work and said E80 no power to Y1. This should turn on the AC and fan. Find community discussions. Didn’t find it? Corrected the issue and AC is back to normal. I am in the middle of installing a Nest thermostat. engineers must measure material characteristics in the E-band frequency range. Everytime I re insert the wires, one of either Y1, C, or Rh (even tried switching to Rc just to see if it fixed), the base reports back saying that one of the three isn't recognized as soon as I insert the base back. E9 E29: No power to C wire detected. Let it run for at least 20 minutes. Ran for months without issue and then the e80 code. On my new thermostat, there are two separate Y connection points - one called Y1 and the other Y2. Have had a 3rd gen for over two years now, everything has been running great from day one. About a week ago the Nest popped up with an error of E103 Y1 wire has over voltage. Everything worked fine until recently when I installed a NEST. Then twist together the Rh, G, and Y1. They're basically partnered HVAC companies in my area? Ask Your Own HVAC Question. The installer did everything except installing a 5 wire line to the thermostat. Huh? E10 E30: No power to Y1 wire … Learn more > Nest.com has moved to the Google Store. Technology Editor Bill Wong takes some unwanted time to replace his Nest with an extra wire in it, but the system had been working for a number of years. Heat works fine and normally. So I installed my Nest 3rd Gen back in April. Initially kept getting e72/e73 (no power to Rc or Rh). see attached? Eventually sorted that out with a new Transformer. Discussion on Google Nest products, including installation and configuration. I have a Second Generation (and Third Generation) Nest Thermostat hooked up to the Central Air Unit. If good for 20 minutes then likely bad thermostat. 1. At least one of these is required. The only exception being the above where I can briefly turn on the AC when Y1 is recognized then within five minutes says no longer recognized. HOWEVER, the AC is still running fine blowing cold air until I pull the base off of the backplate. Hi everyone. - No heating or cooling wires detected - W1 or Y1 wire is required: The Nest Thermostat cannot detect any wires inserted into W1 or Y1. Datsun parts for 240Z, 260Z, 280Z, 280ZX, 510, 520, 521, 620, & Fairlady Roadster New comments cannot be posted and votes cannot be cast. Is there anything I haven’t thought of to check? I did the same with the Y1 wire. Supported configurations that use this connector also include a W1 wire or an 0/B + Y1 wire. So right now, all I have is G, W1, and Rh for power. First: Most likely the blue wire you found is not connected to anything at the other end. As a result for anyone searching for a solution for this: it was indeed a new contactor that fixed my issue. It can't be a bad backplate because I actually had a Nest E thermostat as a spare and for my sanity wired that up for the first time and that is giving me the exact same symptoms as my 3rd gen. Would a Nest Pro be able to help with this? We’re here to help. Your Nest Thermostat either has wires that aren’t fully inserted into the connectors or has tripped an internal fuse. Our condensate line was plugged (or something) and the pump has a safety that shuts down the AC. Here is where things get funky and I'm at a crossroads on what's going on. My setup has been white W1 for heat, G for fan, Rh for power, and the cool Y1. it does and air feels cool nest display reads "nest has detected a problem with the Y1 wire" but on the wiring diagram it does recognize that Y1 is connected. The inside fan will run for about 5 seconds, the condenser does nothing, and then the Nest gives the error that it can’t control this equipment without wiring changes. There is a dehumidifier or humidifier connected to your system. Same error. Something with fuses maybe? The wire contains one hot wire (Rh), one for the fan (G), and one for the cool/compressor (Y1). I then went to the NEST and measured 24 volts with Yellow and Red pulled out of their connections. It is the only way I can complete the setup without an error right now. This wire goes from the Nest to the furnace...then leapfrogs to outside unit. Sometimes condensate overflow or low on refrigerant. First: Most likely the blue wire you found is not connected to anything at the other end. Second: No power to Y1 is an indication of a problem with the AC. I have tried many things to remedy it: Ran brand new Y wire from thermostat to control board (no change), Ran new Y and C wires out to condenser at contactor (no change), Took off contactor and took it apart and cleaned it (no change), Replaced Nest with original thermostat (when cooling clicked on, it blew the fuse on the control board), Checked the resistance across the coil of the contactor and it never went above 1.5 Ohms. I've installed several Nest thermostats (I move a lot) and have never had the issue with one of the two heat pumps in the new house. I measured 24 volts on the Y1 Yellow wire and the Red power wire at the furnace unit wiring interface board. I then took the Red wire and slid it in and out of it’s connector to clean it. Press question mark to learn the rest of the keyboard shortcuts. At the same time, it would recognize my Y1 all of a sudden. No troubleshooting tips other than the "re-cut, strip and insert the wire." Your Nest is physically detecting a wire in the C connector, but isn’t detecting any power to it. Leaving the Nest is a wire labeled Y (Y1)...this is the wire to tell the outdoor unit to kick on. Sign in to ask the community Came home, removed the backplate, made sure the wire was still tight. The wire is relatively unprotected...it is basic thermostat wire that runs with the freon pipes outside. See if it continues to … What the hell? If I wait a while and start from scratch with reseating every wire, the Y1 wire will be recognized and I can get the AC to start and run, BUT within five minutes or so, it will say the power from your equipment to the thermostat may be off. All was good running the A/C and fan. Let it run for at least 20 minutes. The inside fan will run for about 5 seconds, the condenser does nothing, and then the Nest gives the error that it can’t control this equipment without wiring changes. Your Nest is physically detecting a wire in the AUX/W2 connector. I receive intermittent messages of "not enough power" being sent to the thermostat. I have ordered a new exact replacement contactor. Troubleshoot an E code. To check disconnect wires from the Nest base. I have been able to repeat this occurrence. E77 - Y1 wire not detected. Any help would be appreciated. With that low of a contactor coil resistance the coil is bad and shorted out.....the resistance should be close to 10ohm of I'm not mistaken. Why would I get voltage on the Y and C wires with just the wires hanging, but when they are connected to the contactor the voltage drops to 0 and nothing happens with the contactor and the Nest gives the error. Check at the furnace. Talk to a Google Nest expert. HVAC Technician: Daniel Plourde, HVAC Technician replied 3 years ago. But sometimes, after doing the whole reboot cycle of the thermostat, shutting the breakers on and off again, the Rh wire is recognized but then it will say no power to C wire. Second: No power to Y1 is an indication of a problem with the AC. About a week ago the Nest popped up with an error of E103 Y1 wire has over voltage. Have to thank you for this. How much $? look like I have a Goodman b1b099-13 … Discover connected home devices from Nest – thermostats, indoor and outdoor security cameras, smoke and carbon monoxide alarm, security system, video doorbell and more. Please contact Nest support to help troubleshoot this error. I had a question regarding the wiring. Heat pump requires a Y1 wire: The Nest Thermostat is physically detecting a wire in the O/B connector. I added a common wire and I got an e72 code. Check at the furnace. This should turn on the AC and fan. what terminals are the wires connected to on the circuit board in the funace? I have tried adding the common wire and removing the yellow y1 wire as I have seen on other posts. There were recent repairs or service done to your system. Sometimes condensate overflow or low on refrigerant. Yesterday I attempted to switch on the heat and I got a e42 code. I have an unused blue C wire that I inserted into the C slot and it recognized it, but as soon as I did that, it suddenly said no power to the Rh. Simple. Cookies help us deliver our Services. It was, but reseated anyway. Is there some kind of safety switch or something I’m not aware of that prevents voltage going to the contactor? On my old thermostat, the yellow wire was connected to the outlet "Y/Y2". By using our Services or clicking I agree, you agree to our use of cookies. A relay or transformer on your system’s control board is worn or has failed. Well now the NEST doesn't have modes it's just "smart" and does everything for me. Discussion on Google Nest products, including installation and configuration. If I undo the wires from the contactor, I get ~26v and the Nest does not give any errors and works as if the condenser is connected (but isn’t) If I push in the plunger on the contactor, the condenser starts until I let go. then from then on out whenever I actually switched on the heat, I would get an e102 code. New comments cannot be posted and votes cannot be cast. Should I wire my yellow wire to Y1 or Y2? Did you instal this yourself? Then twist together the Rh, G, and Y1. There is more than one wire in a single Nest thermostat connector. (The reason I mentioned both Nests is that I've tried both units). Press question mark to learn the rest of the keyboard shortcuts. Loading. Now I get e103, an overcurrent to Y1. At the condenser, the voltage on the Y and C wires are 0, while connected to the contactor. E52, E53, E54, E55, E56, E57, E58, E102, E103, E104, E105, E106, E107, E108 The Nest Thermostat has an overcurrent error. Use a Common Wire With a Nest Thermostat. i am installing a nest thermostat and looks like a need a common wire. I have tried many things to remedy it: … Can anyone point me in the right direction as to what's going on? Press J to jump to the feed. There were recent issues or upgrades made to your home’s electrical system. Nest and Google Home have joined together as Google Nest. Had the same problem as the OP. To check disconnect wires from the Nest base. I have a Nest Thermostat 3rd gen, and it’s been installed for about a year and a half, no issues at all. Helping customers save Datsun cars & trucks for future generations to enjoy! I do not have access to multimeter to test voltages, but basically I can conclude that: Both heat and AC work fine, so it's not that. Customer reply replied 3 years ago. 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