Potter put my system in. I would be interested in an outdoor
thermostat... should I contact Potter?

Also are you saying that because I set my thermostat low at night and
aux heat is coming on to bring it up to temp in the morning there is a
problem with my system? This is only a problem I had when I was setting
the heat way back at night. If this is a tell tail to a real problem I
want to get it fixed now!

Thanks for the replies!