topic Re: Runaway heating when cooling in Nest Thermostats

Runaway heating when cooling

Ernienewmes — Wed, 14 Jun 2023 23:37:31 GMT

Everything seems to work for a period of time. Then it seems to have a runaway heating issue while indicating it is cooling. I really need some help. I’m glad nest alerts me when the air conditioner, not responding properly( temp rise when it’s calling for ACI pull the air handling unit power, pull the compressor power. With everything reset it seems to go back to normal until it loses it mind again.

Re: Runaway heating when cooling

CoolingWizard — Thu, 15 Jun 2023 13:50:32 GMT

@Ernienewmes , this might be a problem with your Heat Pump reversing valve. The electrical coil on the valve might be going bad. Do you have a B model Heat pump?

AC Cooling Wizard

Re: Runaway heating when cooling

Ernienewmes — Fri, 16 Jun 2023 02:26:51 GMT

How can I tell if it’s a Model B

Re: Runaway heating when cooling

CoolingWizard — Fri, 16 Jun 2023 02:51:22 GMT

Well, Rheem and Ruud are B models. It if you can get the model number of the outdoor unit I can look it up. The other way is to set up your thermostat as a B model then run a cooling or a heating test. If it is cooling when it is supposed to be heating, you have the opposite, you have an O model.

AC Cooling Wizard

Re: Runaway heating when cooling

Ernienewmes — Fri, 16 Jun 2023 03:11:50 GMT

American standard is brand which is actually Trane? I super appreciate the help I have called out techs twice and everything is “Ok”. I also have a “blown compressor” under my belt. I’ll get the model number when I get back home from my business trip.

Re: Runaway heating when cooling

Ernienewmes — Fri, 16 Jun 2023 10:30:03 GMT

It’s an American Standard

4A6H401801000AC

Re: Runaway heating when cooling

CoolingWizard — Fri, 16 Jun 2023 14:28:56 GMT

American Standard and Trane models are O models.

AC Cooling Wizard

Re: Runaway heating when cooling

Ernienewmes — Fri, 16 Jun 2023 15:21:09 GMT

I confirmed the Nest is/was set at “O”

Re: Runaway heating when cooling

zoeuvre — Thu, 29 Jun 2023 20:51:15 GMT

Hi folks,

@Ernienewmes, thanks for reaching out to us, and I'm sorry to hear about the situation. Can you help me with your Nest Learning Thermostat's power reading?

To open the Quick View menu, press the thermostat’s ring.
Choose Settings.
Turn the ring to highlight Technical Info then press the ring to select it.
Select Power.
- Battey
- VOC
- VIN
- IIN

I’ll look forward to your response.

I appreciate your help, @CoolingWizard.

Best,

Zoe

Re: Runaway heating when cooling

Dan_A — Sun, 02 Jul 2023 21:51:04 GMT

Hey there,

I wanted to follow up and see if you still needed help. Please let me know if you still have any concerns or questions from here, as I would be happy to take a closer look and assist you further.

Kind regards,

Dan

Re: Runaway heating when cooling

Ernienewmes — Mon, 03 Jul 2023 11:21:59 GMT

I have been away for the weekend. I will check this out. At the moment it appears to be running nominally. But it loses its mind every few weeks

Re: Runaway heating when cooling

Dan_A — Mon, 03 Jul 2023 16:32:35 GMT

Hello again,

Got it! We'll be keeping this thread open for a few more days to see if the concern happens again. Keep us updated.

Kind regards,

Dan

Re: Runaway heating when cooling

Dan_A — Thu, 06 Jul 2023 16:48:14 GMT

Hello there,

I'm chiming in to ensure you've got the answer you're looking for. Feel free to let us know if you have more questions about this.

Best regards,

Dan

Re: Runaway heating when cooling

LovelyM — Fri, 07 Jul 2023 16:52:46 GMT

Hey Ernienewmes,

We haven't heard from you in a while, so we'll be locking this thread if there's still no update within 24 hours. If you have any new issues, updates or just a discussion topic, feel free to start a new thread here in the Community.

Many thanks,
Lovely