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Dual fuel when I only have single.

Parrajd
Community Member

Hello I'm currently in a little bit of a conundrum 

 

I had an old Honeywell system wasn't the best but heating worked.  The issue is being that I usually would stay at my station in between to work days or three work days I didn't want to keep the heating system all the way on and I would like to have the heating at least pre-started by the time I arrive home so I invested into the nest system 

 

The heating is heat pump and truly all electric as I don't see any other piping going into either the air handler inside or the condenser on the outside. 

 

I copy the system as it was from from the Honeywell and it was working for a bit. I then decided to move the location of the thermostat from one room to the main hallway and from then on I have not been able to have heating properly.  It states alternate stage 2 heating constantly

2 REPLIES 2

Parrajd
Community Member

This is an image of the old system with what neat is sensing 

https://imgur.com/a/MJOGYSI

AC112
Community Member

Dual fuel systems or two stages of heating are two different matters. Duel fuel systems have for the most part a heat pump and gas furnace. 

Based on the information you provided, you do not have a gas furnace. With that information and the wiring on your old thermostat, you have a straight heat pump. Your first stage of heating is your heat pump (W terminal) amd your second stage of heating (W2 terminal) is also referred too as "auxiliary" or "emergency" heat. Heat pumps are not great when it's super cold, so if the temp happens to drop down, your second stage of heat "auxiliary" or "emergency" heat comes online. That is the way a heat pump system is designed to function.

Hope this helps