Google Nest Community

rsworden · 10-23-2024

New Nest Learning Thermostat 3rd gen. Existing Amana AMV81155CXA heating (2-stage) and cooling (apparently 1-stage) system in a house I just moved to. I installed the Nest following instructions on the app and it worked for a few days but drained the...

rsworden · 11-02-2024

Technician confirmed that the B/C terminal was acting a Common for both the heat and air, so it was correct to use it for the thermostat too. What he found that I had not was that the thermostat cable had been extended twice and that one of the conne...

rsworden · 10-30-2024

Well, as I mentioned originally, I tried B/C first and it did not work. Other info about the Amana system seems to indicate B/C is involved in other equipment, like a dehumidifier, so it may not be powered constantly.I found the transformer and based...

rsworden · 10-30-2024

On the schematic there's a transformer with 24VAC out on Red and Blue, no indication of which is which. I tapped the Blue and compared it to frame ground, and got 0.001V. I tapped the Red and compared it to frame ground, and got 28.x VAC. So I assume...

rsworden · 10-26-2024

It's hard to get a clear shot due to all the wires, but here are several angles plus the schematic. Thanks in advance!

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C wire not charging - wrong voltage when connected to Nest base

Re: C wire not charging - wrong voltage when connected to Nest base

Re: C wire not charging - wrong voltage when connected to Nest base

Re: C wire not charging - wrong voltage when connected to Nest base

Re: C wire not charging - wrong voltage when connected to Nest base