Sometimes condensate overflow or low on refrigerant. Check at the furnace. Still same e80 with y1. Hi all, Just got a Nest 3rd Gen as my heater (Stadt 525e-ea) which is a 24VAC system and the existing wiring had the required Rh, G, W, Y so passed the Nest com No power to W1 wire detected. N4, N24 & N74 No power to Y1 wire detected. Well during this time, the internal battery will run to, if you take more than one day to fix this. Sometimes it works, sometimes not. Both thermostats have a Home/Away setting that detects whether you are in or out of the house and adjusts the temperatures accordingly. And when this problem occurs it keeps short cycling my AC. I am in the middle of installing a Nest thermostat. Second: No power to Y1 is an indication of a problem with the AC. Heat pump requires a Y1 wire: The Nest Thermostat is physically detecting a wire in the O/B connector. i recently installed a Nest thermostat and it worked fine for 3 days at which point it lost power to the Rh I called nest and they had me disconnect the Y1 wire and i regained power to Rh and they told me i needed a common C which i had installed now i am no longer getting power to the Y1. To check disconnect wires from the Nest base. Electrician checked wires and they … read more Should I wire my yellow wire to Y1 or Y2? 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. Currently I cannot get the nest to boot due to a Y1 no power message, If I disconnect Y1 the nest will fully operate the furnace but obviously not the AC. Use a Common Wire With a Nest Thermostat. I had a question regarding the wiring. Talk to a Google Nest expert. Please do let me know if you have further questions. The Honeywell has a "K" terminal wire where the NEST does not. Your Nest Thermostat isn't electrically detecting your W1wire, but one is connected to the Nest Thermostat base. That would be the first thing. 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 … There is no common wire with my system, although there is an extra unpowered white wire that was unused previously. All connected all good. I checked the thermostat wire where the worker may have accidentally cut it. A common wire transformer is used to provide power to the Nest if your HVAC system doesn't put out enough power and will charge the Nest Thermostat. So what I would try: Zone 1 R to Nest Rh (24VAC Hot) Zone 1 C to Nest C (24VAC Common) Zone 1 W to Nest W1 (Heat) Zone 1 Y to Nest Y1 (Cool) Zone 1 G to Nest G (Fan) Only thing I don't understand is how the fan gets turned on by the second thermostat in Cool mode. Helping customers save Datsun cars & trucks for future generations to enjoy! This video shows how I fixed an error with my Nest thermostat. 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. We’re here to help. 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. 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. On my old thermostat, the yellow wire was connected to the outlet "Y/Y2". Hello! 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. See what happens. Also, check continuity from the Y1 wire from the stat back to the air handler or furnace. N5, N25 & N75 No power to W2/AUX wire detected. current wiring is Rh, W1, C, G, Y1. engineers must measure material characteristics in the E-band frequency range. Remember, NEST does not recommend using stranded wire, but sometimes this problem can be overcome by the suggestions I made previously. When I connect the blue wire in the thermostat I get a power issue on the nest e. I was told by nest tech support to disconnect it because it's not grounded. Learn more > Nest.com has moved to the Google Store. By turning your breaker on/off actually reset the HVAC power therfore providing power to the Y1 cable. Power was restored to Y1, so I thought I fixed it. Heater blowing but cold air no heat. On my new thermostat, there are two separate Y connection points - one called Y1 and the other Y2. Not so sure it was actually cut but I did it anyway. We had to take off the yellow and blue to make it work, but only heat is working. If your Nest is reading low power or won't charge it may mean that you need to add a common wire transformer. Your Nest Thermostat isn't electrically detecting your Y1wire, but one is connected to the Nest Thermostat base. No a/c, just a goodman gas furnace blowing into house thru vents. The next day, I tried reconnecting the wires while the power was off and then plugged it back in. Thermostat is fairly new. Just because it worked before doesn't mean something couldn't have changed. Does it make sense that the previous homeowner had a y1 wire running to the thermostat at all? Common problems with the Nest thermostat, what causes them, and how to fix it. Please try to re-seat the Y1 cable from your base making sure it is tight. Datsun parts for 240Z, 260Z, 280Z, 280ZX, 510, 520, 521, 620, & Fairlady Roadster First: Most likely the blue wire you found is not connected to anything at the other end. – Allan Apr 26 '18 at 0:45 Diagnose bad sensors as possible cause. Nest doesn’t turn on until it senses both the that wires are hooked up and power is coming to those wires. Hi everyone. The NEST showed the problem to be the Y1 connection but actually it was the Red power wire that was not making a good connection. She has a gas furnace and an A/C unit (no heat pump … read more My understanding is that the y1 wire is for cooling, and my house has no air conditioning (we don't need it in this climate). If so the O and B wires are unneeded and can be removed from the control panel. my daughter has a Honeywell T2060F thermostat and wants to install a NEST thermostat. I'm having problems with my Nest thermostat where it keeps saying my Y1 wire needs checked and that it can't operate my equipment that additional wiring is needed. Discover connected home devices from Nest – thermostats, indoor and outdoor security cameras, smoke and carbon monoxide alarm, security system, video doorbell and more. Remove red wire from RED. The error is E74 - No power to Rh wire detected. When I just do red and white for heat all good. Learn more at nest.com/e74. Then about an hour later, I got the warning again. If I unplug the furnace then reconnect the Y1 wire, it works for about an hour then gives me the warning again. If I disconnect C, it says no power to Y1. Nest Thermostat No common wire - Nest thermostat needs no common wire -problem solved, How To Connect the nest thermostat without a Common wire. Then twist together the Rh, G, and Y1. As soon as I attached yellow blue and green I get the issue. Looked like it was cut so I coupled the wire together. 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