gas furnace cycles back on and off twice before turning off


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Old 11-18-12, 02:34 PM
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gas furnace cycles back on and off twice before turning off

Our Day & Night forced air gas furnace has started cycling on and off twice when it shuts down. That is, I think the fan is.
 
  #2  
Old 11-18-12, 02:48 PM
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An older furnace that has a adjustable blower control can be set 10 degrees lower to get a little bit more heat out of the furnace at the end of the cycle. Lets assume it's just the blower coming back on, because there's heat left over inside and it's warming up the blower control over 130 degrees to turn it back on?
 
 

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