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Posted by Bubba on February 26, 2007, 7:46 am
>Rudd Model= UGAA-10EC, Serial #=TN3D104 M2779 3228
>Electronic Ignition Furnace (Spark)
>
>Problem: Originally, the pilot light worked but the main burners would not
>light. I cleaned the Flame Sensor tip with some light sand paper. Now, the
>main burners will light but they quickly shut off after about 10-30 secs.
>If I hold a long-stick candle lighter to the Flame sensor when the main
>burner lights I can get the sensor hot enought to keep the furnace going for
>a several minutes.
>
>OK, so bad sensor and/or weak flame? Does the sensor need to be glowing red
>hot? The flame looks ok to me, but a Tech I called who is out of state said
>the gas company is putting something in the gas that is clogging up the
>furnaces. My problem just started last night. I'm thinking about removing
>the small gas line from the controller to the pilot-light point and clean it
>out from end to end. Next step replace the sensor (Automatic Pilot E1 Type
>3098-136). I was also wondering if this has a gas filter I could change?
>The GAS controller has several numbers on it 7921 E11, also has Model
>36c84, type 220, 24v 60hz, max pr 1/2 psi, filter cap 2cfh air.
>
>Thanks for your time.
>
>Cheers,
>Jim
>
Your welcome. Anytime.
Replace everything, one at a time, starting with the thermostat first.
When it works, you've figured it out.
Bubba
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