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Old 01-17-2012, 06:59 PM   #1
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ultra V tech 80 furnace

the burners light when the thermostat wants heat, but they go out before the fan comes on. The burners will come on 4 or 5 times and go out, then the furnace turns off. It will do the same thing if I turn the thermostat off and then on again. Even if the fan switch on the thermostat is on, rather than on the auto setting, it does the same thing.


Last edited by licarlton; 01-17-2012 at 07:05 PM.
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Old 01-17-2012, 08:15 PM   #2
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on the face of it i would say the sensor needs cleaning. but it could be something else too. clean the sensor and see if that clears the problem.


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Old 01-17-2012, 08:18 PM   #3
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yes agree with hvac5646 clean sensor 1st also make sure filters are clean something we all forget to do????
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