topic Nest thermostat wiring correct? in Nest Thermostats

Nest thermostat wiring correct?

jlongtm — Wed, 16 Mar 2022 12:27:22 GMT

I think I wired everything correctly however when Heating the Nest does not blow as warm of air as the old thermostat. Note: It has been in the 60’s since I installed.

Here are wiring pics from the old thermostat and the Nest.

Re: Nest thermostat wiring correct?

sporfrog — Wed, 16 Mar 2022 18:44:41 GMT

It's quite difficult to see the terminal letters for the old thermostat in the image - especially for that upper terminal block. Do you have another photo? Or even a photo without the wires would help. It might also be helpful to know about your HVAC system as well.

Also check in the thermostat configuration to make sure system type and fuel and anything else about your HVAC system is correctly set.

Re: Nest thermostat wiring correct?

jlongtm — Wed, 16 Mar 2022 23:18:29 GMT

I do not have a better picture and already tossed the old one. Here is the current Nest system wiring configuration and a picture of the furnace model. The house is a brand new build.

Re: Nest thermostat wiring correct?

jlongtm — Wed, 16 Mar 2022 23:20:34 GMT

Here is the Lennox model info

Re: Nest thermostat wiring correct?

Patrick_Caezza — Thu, 17 Mar 2022 00:09:25 GMT

That M/N number is just for the EVAPORATOR COILS and not the complete system.

Take a look inside of the air handler/Furnace and post a picture of the terminal block on the control board inside of it.

What we are looking for is where the blue wire terminates.

Re: Nest thermostat wiring correct?

jlongtm — Thu, 17 Mar 2022 00:50:21 GMT

I just realized I selected ELECTRIC for Heat when I initially set up the Nest. My furnace is GAS. How do I change this? I think the wiring is correct

Re: Nest thermostat wiring correct?

Patrick_Caezza — Thu, 17 Mar 2022 03:05:18 GMT

Are you sure you have a heat pump system?

Follow the instructions provided here to change your heat source.

https://support.google.com/googlenest/answer/9242116?hl=en#zippy=%2Chow-to-change-your-type-of-heating-equipment

Re: Nest thermostat wiring correct?

MelbaDT — Wed, 23 Mar 2022 07:15:29 GMT

Hey folks,

Patrick_Caezza, thanks for your answers and for the link. I also appreciate that you took the time to respond, sporfrog.

jlongtm, glad to hear that you've got the answer you're looking for. Feel free to reach out again if you need anything else.

Best,

Melba

Re: Nest thermostat wiring correct?

MelbaDT — Sat, 26 Mar 2022 07:38:38 GMT

Hi,

I haven't heard from you in a while so I'll be locking this thread if there is no update within the day. Should you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

Best,

Melba