Cooling works on one floor but not the other (blows hot air)

[cckelly21]

 

Hey all - as the title says, on the second floor the A/C is working as expected (top picture) but on the first floor of my house the A/C is blowing hot air (bottom picture). I’m hoping it’s just a wiring issue, does anyone have any ideas? I’m not at home at the moment but the Rc wire might be unplugged or maybe I should unplug Rc entirely?

Thanks in advance!

[Patrick_Caezza]

Post a picture of the original thermostat's wiring here.

[cckelly21]

Not sure what you mean by “original”, I posted pictures of both thermostat’s wiring.

[Patrick_Caezza]

By "original" I mean the thermostats that were installed before the Nest.

You can't go by the wire colors as there is no standard and some are wired any which old way.

[EdwardT]

Hi folks,

@Patrick_Caezza, thanks for the help!

@cckelly21, how's it going with your Nest Thermostat? Still need our help?

Thanks,

Edward

[MelbaDT]

Hey cckelly21, 

Checking back in should you still need our help here. If you do, please reply back with the photos being requested above.

Best, 

Melba

[cckelly21 · Accepted solution]

The fix ended up being changing the heating type to electric even though it runs off of oil, something about how the system is setup. This made it so the heat and A/C didn’t turn on at the same time when calling for A/C.

[MelbaDT]

Hey there, 

Thanks for getting back to us and for sharing what you've done to have it fixed — glad to hear that you've got your thermostat working as it should. 

Best, 

Melba

[MelbaDT]

Hi, 

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

Best, 

Melba