Gas and Oil Home Heating Furnaces - Furnace Cycling

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Lisa Averill
02-14-02, 01:34 PM
My furnace will click on then run for 5 seconds, then it will stay off for a few seconds, then on again then off. It will do this foe several times then it may stay on for a couple of minutes then off for 20 seconds. Then it may come on and run until it grts close to the temp. desired, then off. We have a programmable thermostat. What could be wrong, is it the furnance or the thermostat? You can hear the furnance flame come on and off as well.

Thanks

Forum Moderator Note:
Subject wording edited to consolidate and clearify topic.

Forum Moderator
Tom_B

fjrachel
02-14-02, 06:31 PM
Problem is more than likely in the furnace. Are the air filters clean? It could be a variety of problems, call your servicer.
dibia
02-16-02, 09:23 PM
If when your furnace comes on ignitor glows,then ignites and
flames goes out; your Flame Sensor might be going bad.
Good Luck!!!!