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?
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Lit our fireplace for the first time this season last night and the whole living room filled with smoke, alarm went off. Chimney was cleaned last year...