Originally Posted by seawood
When was the last you replaced the air filters if they are pluged you will not have athe right of return air and will trip high limit and if it trips often it will stay open
I replaced the filter this week. Is there only 1?
I had seen the 4 blinking lights and read on line that it was sometimes due to a dirty filter. Sure enough the filter was dirty so replaced it and the 4 flashing lights changed to a normal pattern. Still I did not get the forced air and then the 4 flashing lights started again.
The worst symptom is no forced air so the house temperature never reaches setpoint.