View Full Version : Need help with CT87N thermastat
Artphyl
Jul 21, 2010, 07:13 AM
Installed a CT87N thermastat problem with air conditioning. Can't seem to control temperature. Thermastat runs continually to the point where windows frosted up. Can't turn it off so had to turn of circuit breaker. Just installed yesterday, know it is installed correctly
wmproop
Jul 21, 2010, 07:59 AM
If you know it is installed correctly must be something wrong somewhere else, maybe a short between red and yellow wire or a stuck/welded contactor in condenser unit
Artphyl
Jul 21, 2010, 12:10 PM
Thank you, returned thermastat to store. Replacement is fine so believe the original thermastat was defective.