cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
Help
Replies are disabled for this topic. Start a new one or visit our Help Center.

NEST Thermostat showing wrong tempature

Kcaldw9133
Community Member

‎11-30-2023 04:28 PM

My heat pump  was recently serviced by a technician for activating heat in the aux. Heat mode. Nothing could be found and everything seemed to be working after the service call. Now my NEST Thermostat is showing an inside temperature of 80 degrees and the heat has been off for two days. I can't turn on the heat without dialing up the tempature to 86 degrees and it's blowing cold air. Any suggestions?

0 Kudos
Reply
1 REPLY 1

zoeuvre
Community Specialist
Community Specialist

‎12-03-2023 02:40 PM

Hi Kcaldw9133, 

 

Oh no! I'm sorry to hear that your Nest Thermostat is displaying an inside temperature of 80 degrees despite the heat being off for two days, and when you try to turn on the heat, it blows cold air. This may indicates a potential issue with the thermostat or the HVAC system. A few questions: 

 

  1. Are you located in North America or Europe?
  2. Does the thermostat screen indicate that it’s actively calling for heating?
  3. What type of furnace do you have? (gas, electric, etc.)
  4. When did heating last work?
  5. Did heating ever work with the Nest Thermostat?
    If not: Did the heating work with the previous thermostat?
  6. Did you turn off the power to the HVAC system?
    • Did you recently turn off any breakers?
    • Have you recently experienced a brownout or blackout?
    • Is there a light switch near the heater that controls an outlet?
  7. Did you select the correct fuel type?
  8. Do the LED lights blink on the HVAC control board? If yes, locate the light.
  9. When was the last time you changed the furnace's air filter?
  10. Have you experienced extremely cold weather lately?
  11. Is this the first notable temperature drop of the year in the area?
  12. When was the thermostat installed?
  13. Where did you install your thermostat? In a room and on a wall or stand? 
  14. Do you have other active Nest Thermostats? If yes, do they show the same issue?
  15. How big is the difference between the readout of the Nest thermostat and your thermometer or other thermostats?
  16. Have you tried any troubleshooting steps? If yes, would you mind listing them?

 

Gather the power readouts of your Nest Thermostat's VIN, IIN, and PS-* under Settings > Equipment > Power Info for Nest Thermostat 2020 and Battery, VOC, VIN, and lIN under Settings > Technical Info > Power for Nest Learning Thermostat and Nest Thermostat E. Go to Settings > Technical Info > Network and check for its Signal strength value. Also, you may try following these: 

 

  1. To troubleshoot a Nest Thermostat issue, ensure that it is set to the correct mode (heat) and the desired temperature is set to a reasonable level.
  2. Double-check the wiring connections between the thermostat and your HVAC system to ensure they are securely connected.
  3. Power cycling the thermostat by removing it from its base and disconnecting power for a few seconds can help reset temporary software glitches.
  4. If the issue persists, perform a factory reset on the Nest Thermostat, but note that this will erase all settings and preferences, so you need to set it up again as if it were new.

 

Keep us posted. We're happy to help.

 

Best,

Zoe

0 Kudos
Reply