AC condenser shuts off for a second or two occasionally

[drriet]

I have a Nest learning stat that I have noticed on several occasions seems to not send a cooling signal to the AC condenser for a second or two during a cooling operation and then immediately restore the signal.

It does not happen every cycle, in fact, it seems to rarely happen. Unless you are paying attention you will not even notice it. 

I have checked all connections at Tstat, furnace control board, and AC condenser, as well as checked ohmic value of AC contactor. All are good. 

I believe it has to be a T-stat issue and it can't be doing my cooling equipment any good. I am short of solutions other than scrapping my Nest 

[Therealduke]

That's ironic because I have the same thing happening with my fan.  It seems to pause arbitrarily for about 1/2 second and restart.  I have a feeling it is also a problem with my Nest.

[Jenelyn_O]

Hi folks,

@drriet and @Therealduke, thanks for reaching out. I'd like to take a closer look at it. A few questions: in what states are you located? Do you have a schedule created? Do you have a C wire? Please provide your Nest thermostat's power readout. 

You can follow the guide below:

1. Go to your thermostat Quick View menu.
2. Go to Settings.
3. Look for Technical Info.
4. Select Power.

Also, please check your thermostat Energy History. It might help you see what your thermostat was doing previously.

Best,

Jenelyn

[Therealduke]

I’m in NH

No schedule 

yes added a c wire but no change

i will check power values probably tomorrow evening or Saturday am

[Therealduke]

 

[Therealduke]

I noticed the fan pause occurred today when cooling call was satisfied when furnace went to purge

[Jenelyn_O]

Hi Therealduke,

Thanks for providing the information above. Your Nest Thermostat's power readings are totally fine. It looks like your thermostat is receiving sufficient power. Please check your thermostat's Energy History. Also, try to restart your thermostat by going to the Settings > Reset > Restart. After that, continue monitoring your system's behavior. 

Thanks,

Jenelyn

[Therealduke]

What should I be looking for in energy history 

is this at the thermostat or in the app

[Jenelyn_O]

Hi there,

Checking your Nest Thermostat's Energy History might help you see what your thermostat was doing previously.

You can follow these guides:

Home app

1. Open the Home app .
2. Tap your device's tile.
3. Tap Energy dashboard .
4. Select Day, Week or Month.

Nest app

1. Open the Nest app and tap the Nest thermostat icon on the home screen.
2. Tap History .
3. Your 10-day summary should show. Tap on any day to learn more details about your heating system's energy use.

Thermostat

• To review your Energy History, in the Nest thermostat's Quick View menu, select History .
• If you’re using a Nest Thermostat E, your Energy History should be in the Settings History.

Regards,

Jenelyn