Forced air furnace problem


Old 11-18-02, 08:41 AM
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Forced air furnace problem

I have a Rheem model #RGDE-07EMAGR forced air furnace with a honeywell class2 LR1620 30v. Thermostat. My problem is this- when heat is called for, Exhaust fan comes on, burner ignites, main fan comes on. All which is normal. After 2 mins of operation- the burner shuts off, leaving the main fan running for 1min and the exhaust fan stays running unless turned off manually. The unit is 11 years old with no major problems other than changing the igniter about a year ago. Please Help?
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Old 11-18-02, 06:51 PM
hvac4u's Avatar
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Location: NW atlanta
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sounds like the

unit is starving for air, and high limit taking it out. check filter, blower wheel and coil for blockage.
Old 11-19-02, 05:47 AM
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problem solved

You hit the nail right smack on the head. Found outside exhaust door dampner stuck closed. Will give unit a good cleaning. Thanks for the help.

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