01-17-2024 02:26 AM
I set up our nest over the summer. We have forced air A/C and gas heat. The A/C has worked without issues. We also have radiant heat in the house, controlled by a separate thermostat, that we've been using to heat the house. During a particularly cold snap, we turned on the forced air and I discovered that the system reads as having two heat sources, one being a head pump.
The original wiring had a jumper from Rc to Rh and connections to both W and W2 as well as O. The set up app has me connected to Rc, O/B and W2.
I don't see a way to change my heat source from within the nest app.
Thanks
01-20-2024 08:58 AM
Hello Hornezd,
It seems like you've encountered an issue with your Nest setup, specifically with the detection of multiple heat sources. To address this, you may want to check the wiring and settings on your Nest Thermostat.
Firstly, it's good to hear that your AC has been working well. Regarding the radiant heat and forced air system, the presence of a heat pump might be causing the confusion in the Nest thermostat's detection. Here are a few steps you can take to troubleshoot:
I'll look forward to your response.
Best,
Mark
01-20-2024 01:43 PM
The radiator is controlled by a separate thermostat. I haven't braved converting that one to a Nest yet, but I intend to. How to get two different systems controlled by different Nests in different parts of the house
The current nest controls just the forced air/heat. Unfortunately it appears that I can't upload my photo of the original configuration so I'll describe as best I can:
C - connected | Rh - connected by jumper to Rc |
O - connected | Rc - connected |
B - empty | G - connected |
W - connected (wire was brown) | Y - connected |
W2 - connected (wire was white) | Y2 - empty |
I connected the Nest in a similar fashion and it registered the forced air but believed the heat to be a heat pump.
I was unable to select forced air heat as an option, even in pro mode.
My next move was to change my connection configuration to:
Y1 - connected | W1 - connected |
Y2 - empty | W2/Aux - empty |
G - connected | C - connected |
O/B - empty | * - empty |
Rc - connected | Rh - empty |
So the jumper was removed between Rc/Rh, W2 is empty, the brown wire that was connected to W is no longer connected to anything, and the orange wire that was connected to O is no longer connected to anything.
Once I did this, the heat started to work. I do wonder if the A/C will work come the warmer months..
02-03-2024 02:11 PM
Hey there,
I'm sorry for the late reply. If you've made changes and the heat is working but you're concerned about the air conditioning, it's a good idea to test the cooling functionality to see if it's functioning correctly. Also, it would be easier for me to visualize it with a photo.
To insert an image in a post:
Keep me posted.
Regards,
Mark