Forum Discussion
JaxDad
Mar 24, 2016Explorer III
nebmike wrote:
Fan seems to be pushing an appropriate amount of air, it just seems like the air coming out isn't as warm as I'm used to.
Also, it seems as though every few minutes it'll blow cooler air for a while and then go back to somewhat warmer.
That sounds like the furnace is hitting the high limit.
When it does, the burner shuts off until the high limit sensor thinks the temperature has dropped to a safe point. This when you feel the cool air. Then the burner comes back on and you feel heat.
Look for an obstruction right near the furnace, that would be the most likely culprit.
It could also just be a defective or improperly positioned high limit switch.
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