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Posted by Bubba on February 26, 2007, 3:39 pm
On 26 Feb 2007 07:45:18 -0800, "jamesgangnc"
>> 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
>
>It is very unlikely that the line to the pilot is clogged. There is
>not any gas filters.
and thats exactly why you shouldnt be giving advice. You've obviously
never taken a gas valve apart. Many of them have filters in them. They
just arent meant to be "user serviceable"
> I've never heard of the "something in the gas
>that is clogging up furnaces" story before.
Then why do orifices in pilot burners have to be cleaned?
> It could be the flame
>sensor or a number of other things.
Hey.......good guess, Einstein.
> Without specifications and test
>equipment you will have to resort to replacing suspect items. That
>can get expensive pretty quickly and nothing electrical will be
>returnable. If you really want to go that route I imagine most people
>would guess the sensor as the next likely item.
Nope. Wrong again. Everyone knows you have to replace the thermostat
first.
> Your unit is well
>into the end of it's life expectancy. And as others pointed out it is
>a bit dangerous to mess around with gas appliances.
........and as for James, dont worry. I wont show up at your doorstep.
Especially to work on a rooftop unit.
Bubba
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