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Furnace heat cycles on/off

Asked Mar 9, 2007, 12:25 AM — 1 Answer
We have an old furnace,not quite sure how old.It is a Bryant Quietair.I noticed tonight the burners would light,stay lit for a few seconds(30-40secs.),then go out,and then relight a few seconds later.The fan is running throughout the whole process like it should.This goes on constantly.What is going on in there?Can anyone please help?

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hvac1000 Posts: 14,546, Reputation: 2381
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#2

Mar 9, 2007, 03:26 AM


If that older unit has the 3 wire pilot safety assembly it could be defective. When was the last time a professional serviced your furnace? Now could be a good time to have that done and also see why you are having this problem.
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