12-28-2022 06:36 PM
I’m using a 1st generation Google Nest Thermostat. Above are pictures of
(1) the original thermostat wiring - did not use jumpers as per Google. 1st gen only has 6 terminations: W C Y G R OB*
(3) Current configuration of downstairs - not configured for heat pump. Only way I can get heat in this zone.
(2) screenshot of the technical manual thermostat wiring - the air handler model I have TEM4A0B24S21SAA but the only TM I could find was for TEM4A0B24S21SB, not sure if there’s too much of a difference.
(3) the side of the air handler - looks like the thermostats are daisy chained?
Soon as one zone (upstairs and downstairs respectively) starts working; I don’t get heat in the other zone. The outside unit for the heat pump would only would kick on for upstairs zone.
That was a lot,
Hope y’all can help,
12-28-2022 08:47 PM
Do you have 2 Nests?
The wiring looks like a basic heat pump.
Not sure how the 2nd tstat is wired into the system.
How does it change zones is there a zone damper in the ductwork that changes the air flow?
The wiring info is usually on a decal on the back of the door of the air handler and also outside another decal if you take off the cover where wires enter the unit.
12-28-2022 09:07 PM
Here is some info about zoned systems
01-02-2023 02:46 PM
lkjhg, checking in — we hope you've got the answer you're looking for. Let us know if you have more questions in mind.
I appreciate the help, Houptee.
01-05-2023 05:28 PM
I just wanted to follow up to see if you still need our help. Please let us know as we would be happy to answer any questions you may have.
01-10-2023 03:05 PM
Just checking in to make sure that you've seen our responses. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.