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Old 11-17-2020, 08:47 AM   #1
GBB
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Furnace

Isnít the blower on furnace supposed to run for couple minutes for cool down after flame shuts off. Furnace is either off or on.
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Old 11-17-2020, 10:16 AM   #2
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Originally Posted by GBB View Post
Isnít the blower on furnace supposed to run for couple minutes for cool down after flame shuts off. Furnace is either off or on.
Don't know the brand and model of your furnace but regardless, I believe all furnaces operate the same way as to the fan.

Yes, the fan should continue to run after the burner shuts down and it should begin to run before the burner ignites.
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Old 11-17-2020, 10:21 AM   #3
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Ours runs on for a while after we turn it off. Everyone one of our trailers has worked that way.
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Old 11-17-2020, 12:02 PM   #4
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Suburban SF Furnaces

See Pg 26 for sequence of operation
See Pg 31 for troubleshooting steps (last step...fan should run 'cool down' cycle ----bad blower circuit on module board)

http://techsupport.pdxrvwholesale.co...ing-Manual.pdf
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Old 12-02-2020, 07:45 PM   #5
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They work pretty much the same as a forced air furnace in a house.

Fan runs to clear any residual propane gas inside the unit, ignition fires and runs to t-stat setpoint, turns gas off, and then fan runs for about 1 minute to clear the unit of gas and heat. (simplified version)

I would repair it soon if it does not work this way.
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Old 12-03-2020, 07:44 AM   #6
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You should consider getting an IR thermometer. They are very handy and you can easily use it to monitor your furnace. Just shoot a register and watch the temps thru the cycle. One thing to watch for is cycling of the burner during the run. Basically the combustion chamber gets too hot and the flame shuts off for a bit then reignites. RV furnaces should not run this way from what I understand. The solution is to add an additional vent so heat escapes more rapidly. It is easier to do than it sounds. But without a way to monitor the temps, you don't know what is occurring.
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