Any HVAC experts?

[wingedfish]

Originally Posted by rayjay

Do you have any electrician friends? Any experienced electrician should be able to help you out.
However, you now know the fan doesn't go on with the exchanger when the selection is made to "on" instead of "auto" so as long as everything still works correctly when the furnace or AC is working along with the exchanger, just leave the selection where it is.

A Psc fan running steady will eat $200 in 3 months with today's power costs.
If you have an ecm motor ( commonly called "DC" or "variable speed" it might take 6 months. Fixing it will be far cheaper.

This is an Hvac issue and we deal with it all the time. The a/c guys should have seen wires and fixed it when they installed it.

[Seriak]

I don't use the air exchanger very often which is why I didnt notice this happening until years after the ac was installed. I just thought it might help my heat differential from top floor to bottom floor in the summer hence how I found out it was doing it.

I may have a look myself and see what is up in there.