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Old 10-08-2012, 11:19 PM   #1
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Gas furnace comes on then goes off


Gas furnace comes on then goes off stay on about 2 second i just install a White-Rodgers 50M56U-843 a/c works great it is a Rheem unit (Gas Furance)

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Last edited by Texasbill; 10-08-2012 at 11:21 PM. Reason: correct spelling
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Old 10-08-2012, 11:25 PM   #2
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Gas furnace comes on then goes off


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Originally Posted by Texasbill View Post
Gas furnace comes on then goes off stay on about 2 second i just install a White-Rodgers 50M56U-843 a/c works great it is a Rheem unit (Gas Furance)
what comes on the burner....better description will help us

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Old 10-08-2012, 11:28 PM   #3
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Gas furnace comes on then goes off


Yes the burner,comes on then goes off after 20 seconds.

Last edited by Texasbill; 10-08-2012 at 11:48 PM.
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Old 10-08-2012, 11:32 PM   #4
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Gas furnace comes on then goes off


flame sensor dirty????
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Old 10-08-2012, 11:36 PM   #5
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Gas furnace comes on then goes off


great place to start.... clean it
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Old 10-08-2012, 11:51 PM   #6
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Gas furnace comes on then goes off


New senor came with the kit I position the senor in the center of the flame tube it glow and ignite the gas for about 20 second.

Last edited by Texasbill; 10-08-2012 at 11:56 PM.
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Old 10-08-2012, 11:57 PM   #7
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Gas furnace comes on then goes off


Rheems are famous for the pressure tubing plugging or the port on the inducer motor plugging...check that as well....
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Old 11-13-2012, 09:13 PM   #8
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Gas furnace comes on then goes off


Thanks all for your input final got it to stay on the wiring harness did not have the flame senor wiring going to the flame senor I found it out after troubleshooting the wiring on the unit and connection wiring kit (White -Rodgers) Thanks again .
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Old 11-13-2012, 09:20 PM   #9
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Gas furnace comes on then goes off


that explains a lot......

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