PF-100 Door flap going nutz

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P0ZBURN

Member
Nov 8, 2010
48
OHIO
Sometimes when my pf-100 is running on the ash door the small flap fluttering like mad. Like several hundred oscillations a minute.The flame flutters as well. Seems more apparent when t-stat calling for the furnace to run at full potential. Quite annoying at times. Anyone know what causes this? I have cleaned the furnace it still does it. thanks
 
If you don't get an answer - try the boiler room. Good luck and hope you find a solution. Have you discussed with the dealer?
 
you may also want to check the flapper on the air intake flange, it may have broken a tab or something. it should swing freely when you tap it with your finger.
 
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