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Nest learning thermostat dual fuel

Martinpro
Community Member

Hello,

We set this up yesterday, and the heat pump was covered with ice this morning. Did we do this right? We have a dual fuel system. 

Thank you

PXL_20221214_160226649.jpgPXL_20221214_165653062.jpg

5 REPLIES 5

Houptee
Silver Product Expert
Silver Product Expert

Did you tell the Nest you had a heat pump with auxiliary heat during the Nest setup?

Sounds like it is not using the Aux heat to warm the house and only running the heat pump outside non stop causing it to ice up.

 

 


Houptee -- NJ Master HVAC Licensed Contractor

Houptee
Silver Product Expert
Silver Product Expert

If the aux heat is a gas furnace inside that you want to kick on instead of the heat pump then you need to set a temperature that Nest will shut off the outside unit and switch to the other heating system (a gas furnace for example) :

  • If you have a dual fuel system, a type of system with a heat pump outside and a separate heater installed inside your home, you won't be able to use Heat Pump Balance. If you have a dual fuel system, you can set a lockout temperature manually in the Nest thermostat's Equipment menu.
  • Heat Pump Balance options

  • Off: If Heat Pump Balance is off, your thermostat will use your AUX heat based on a lockout temperature that you set. The AUX lockout temperature can be changed in
  • Settings, Equipment, Heat Pump.

Houptee -- NJ Master HVAC Licensed Contractor

aatienza
Community Specialist
Community Specialist

Hey Martinpro,

 

I'd like to jump in here and check if you've seen Houptee's response. Let us know if you need more help by replying to this thread.
 

Thanks,

Archie

Martinpro
Community Member
Thanks for reaching out. We are all set with the thermostat. It was our wood stove that made it seem like we want the heat pump running so hot. We made the proper adjustments and enjoyed our NEST. 
Thank you
 

aatienza
Community Specialist
Community Specialist

Hey Martinpro,

 

That's great to hear! Let us know if you have other questions as I'll be locking the thread after 24 hours.

 

Thanks,

Archie