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Old 11-30-2010, 12:26 PM   #1
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Ducane furnace fan runs no heat


fan keeps running after flame comes on for 15 or 20 min or so then flame goes out
already changed thermostat
roll of sw ?
pressure sw ?
help its cold

THKs

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Old 11-30-2010, 01:09 PM   #2
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Ducane furnace fan runs no heat


Look at control board for flashing light. Count flashes & look for code on back of blower door

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Old 11-30-2010, 06:03 PM   #3
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Ducane furnace fan runs no heat


John go buy a cheap volt meter instead of randomly replacing parts. Limits should be closed all the time. Pressure switches start open then close when the inducer comes on. Once you find which componet is causing the fault then move on to why.
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Old 12-02-2010, 11:19 AM   #4
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Ducane furnace fan runs no heat


code indicate rollout switch
replaced same problem persist
no flame roll out can be seen
but house over burner section
the top of unit get extremely hot fast
unit shuts down in 10 min
faster after cool and reset switch
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Old 12-02-2010, 11:21 AM   #5
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Ducane furnace fan runs no heat


Quote:
Originally Posted by kenmac View Post
Look at control board for flashing light. Count flashes & look for code on back of blower door
code indicate rollout switch
replaced same problem persist
no flame roll out can be seen
but house over burner section
the top of unit get extremely hot fast
unit shuts down in 10 min
faster after cool and reset switch
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