topic Re: Nest thermostat wires for heat pump Blow Hot in Nest Thermostats

Nest thermostat wires for heat pump Blow Hot

NguoiViet41 — Tue, 01 Nov 2022 01:37:34 GMT

I Need help on Nest Thermostat with heat pump system

after wires with Nest Thermostat i got hot air

Thankssssssss

my original wires

G - Green

C - Blue

R - Red

y with jumper w1 - Yellow

W2 and E - White

O - Orange

Re: Nest thermostat wires for heat pump Blow Hot

NguoiViet41 — Tue, 01 Nov 2022 12:57:10 GMT

THIS IS MY OLD THERMOSTART

Re: Nest thermostat wires for heat pump Blow Hot

Houptee — Tue, 01 Nov 2022 15:02:21 GMT

Do not use any jumper wires on the Nest.

Try white to W2.

The OB is what changes the unit to Heat or A/C mode, so if it is wrong you have to change the function of OB wire.

Post pic of the Nest wiring.

Re: Nest thermostat wires for heat pump Blow Hot

NguoiViet41 — Wed, 02 Nov 2022 16:17:49 GMT

I Try Both Still Blow hot

1-wires and setup O or B No Go2-wires and setup O or B No Go

Re: Nest thermostat wires for heat pump Blow Hot

Markjosephp — Sat, 05 Nov 2022 13:48:10 GMT

Hi folks,

I wanted to stop by and see how I could help.

Thanks for the assistance, @Houptee.

Great troubleshooting so far, @NguoiViet41. I appreciate that you've tried to find a fix. Let's find out more about what happened.

You can also give this steps a try in this article and let us know how it goes.

Best regards,

Mark

Re: Nest thermostat wires for heat pump Blow Hot

Houptee — Sat, 05 Nov 2022 15:08:03 GMT

Leave White wire disconnected and try the A/C mode.

If blows hot, change the O/B function in Nest settings until A/C works and blows cold.

Then once AC is working, now try turning on Heat to see what happens.

If you get heat with white wire still disconnected then the heat pump is working normal.

After the heat pump problem is solved you need to figure out is the White wire for emergency electric backup heat?

Re: Nest thermostat wires for heat pump Blow Hot

Markjosephp — Tue, 08 Nov 2022 16:46:16 GMT

Hi there,

I appreciate your assistance, @Houptee.

@NguoiViet41, I'm checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns.

Best regards,

Mark

Re: Nest thermostat wires for heat pump Blow Hot

Markjosephp — Wed, 09 Nov 2022 16:49:29 GMT

Hello NguoiViet41.

It has been a few days since the last reply, and I am going to lock the thread within 24 hours. If you have any questions, please feel free to create a new post.

Best regards,

Mark