Home>Discussions>INSULATION & HVAC>heater "fan only" operation
3 posts / 0 new
Last post
heater "fan only" operation

I have a gas fired furnace in the pole barn of a house I just bought. The thermostat has a two wire lead running to it, with connections to "W" and "R". It functions properly in the heat/auto mode, but will not work in the fan only mode. Any idea how to make it work in fan only mode? Based on looking at the house thermostat, I'm guessing that I need another two wire lead to "G" and "Y" ---anyone know for sure.

Re: heater "fan only" operation

Yep ---- you need to run a wire from the " G " connection on the thermostat to the furnace " G " connection. This is for the fan manual operation.

The " Y " is for air conditioning.

Hopefully this helps.

Re: heater "fan only" operation

Thanks, appreciate the help.

Sponsored Stories

TV Listings

Find TV listings for This Old House and Ask This Old House in your area.