AC seemed to be working fine until this morning noticed that the blower was turning off for about 30 seconds and in 5 minutes intervals. I set the thermostat to OFF and it had not impact. I went to the attic and the unit has a code 21. Is there anything I can try before I call for service?
-
Has anyone had an occurrence of a Laser 730 or 731 over firing?
The top of the heat chamber and the heat exchanger glow red on high when this occurs....