Heats turns on while termostat is on cool

[Rmorell]

Heats keeps turning on while termostat is on cool, when temp is reached, termostad turns the heater on to raise temp one degree 

[zoeuvre]

Hi Rmorell, 

Oh no! I'm sorry to hear that your heat keeps turning on while termostat is on cool and raises temperature to one degree. Let's see what's going on. A few questions: 

• Are you located in North America or Europe? 
• What type of Nest Thermostat do you have?
• Is the Nest thermostat newly installed?
• Does the thermostat screen indicate that it’s actively calling for heating?
• What type of furnace do you have? (gas, electric, etc.)
• When did heating last work?
• Did heating ever work with the Nest thermostat?
• 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?
• Did you select the correct fuel type?
• Do the LED lights blink on the HVAC control board? If yes, locate the light.
• When was the last time you changed the furnace's air filter?
• Have you experienced extremely cold weather lately?
• Is this the first notable temperature drop of the year in the area?

I'll look forward to your response. 

Best,

Zoe