my Honeywell 6300B thermostat raises the temp even if it's set on a certain setting. how do I fix this?

Answer 1

I had a problem with a Honeywell thermostat. You can go the website and download the instruction books. Hope this helps.

Answer 2

First step. Make sure there is no hole in the wall behind the thermostat where the low voltage wires come thru. Seal it if there is. A draft will trick the thermostat.

Answer 3

It is probably cycling too long and running past your set point. so you need to adjust the cycle time. For this you need an instruction book to do a proper job.