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How to lower the Dual Fuel setting lower than -12C (approx 10F)?

Community Member

I have both a HE gas furnace and a brand new heat pump for my home.

I’d like the heat pump to be my main heating source to -17C (about 1F) based on my equipment and my local gas/electricity costs. 

How can I set it lower?  The nest app on my phone only allow the Dual Fuel setting to go to -12C ( approx. 10F). Any lower setting is called ‘Never’. 



Community Specialist
Community Specialist

Hey WillowPost,

We appreciate your interest however; we don't have any news to share about a temperature lower than -12C ( approx. 10F) for dual fuel systems. We're always looking for ways to improve and we'll take it as feedback.

I also suggest that you send feedback by following this link. Let me know if you have other questions or concerns, otherwise I’ll be locking this thread after 24 hours. 


Hey there WillowPost,
Checking back in should you still have some questions here. Let us know by replying to this thread. 


Community Specialist
Community Specialist

Hello everyone,


@WillowPost just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.


I appreciate the help, Mel.