Furnace problems - http://www.hvacmechanic.com/ Forums
Original message
| mightyone
 |  "Furnace problems"
, posted Sat 19 Feb 20:17  
I have a Miller furnace and a honelwell thermostat. The problem i have ist that if i set the thermostat higher than 20, all the furnace does it blow air and it will try to ignite but the flame will only stay on for 3 seconds. It will repeat itself non stop until I turn the thermostat back down to 20 or below. This just started happening, can anyone help?
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Replies:
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| tommieg
| "Re(1):Furnace problems" , posted Sat 19 Feb 20:19
clean your flame sensor
nona?
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| | mightyone
| "Re(2):Furnace problems" , posted Sun 20 Feb 03:32
weel the problem doesn't occur if its under 20 on the thermostat. It works fine if its under 20 but anything over the fan on the furnace will just keep running and the pilot light will ignit the flame but it will shut off in 3 sec. This is continuous.
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| | beginner
| "Re(3):Furnace problems" , posted Sun 20 Feb 11:44
Check your filter! It appears to be over heating.
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| | mightyone
| "Re(4):Furnace problems" , posted Sun 20 Feb 15:04
I thought about that and chnged it this morning, however, the same thing occurs. I even tried it with the filter out. I thought it could be my honeywell digital thermostat so i put the old one in, same problem.
Could it be anything else?
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