Pilot problems on Coleman presidential II

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Pilot problems on Coleman presidential II

Postby msufroggy » Mon Dec 08, 2008 1:18 pm

Hello.
Furnace model #7710-856 Presidential II

Well recently fixed two problems thanks to this site (that I wrote about before...the booster motor and the crossover duct repair) so now furnace is blowing heat, but now we've come across another problem. :( (sigh)

The pilot seems to stay lit the entire day, then the furnace will kick on, and stay on until the thermostat temp is reached (ie it never shuts off prematurely), but once the burner/ blower goes off, the pilot also goes out!

I lit the pilot, and just turned on the blower to make sure the blower isn't doing it, which it is not. (if it did I guess it would probably mean a major gap/hole in the exchanger???? YiKeS! I have 3 carbon monoxide detectors in the home, and all is well, according to them).


I have yet to check the roof vents/etc for blockages, but I'm puzzled as to why the pilot only goes out right after the burners/blower shut down??? Anything else I should check? If it was a bad thermocouple, then why is the pilot staying on the entire day when the furnace is not in use?

It's becoming a real pain in the u know what to keep relighting the pilot when we need the furnace on.

Any input is appreciated. Thanks!
msufroggy
 
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RE: Pilot problems on Coleman presidential II

Postby Robert » Mon Dec 08, 2008 10:25 pm

Hi,

Well without calling an hvac tech, it is just a guessing game as to what it is.

My first and second suspects would be transformer secondary voltage to gas valve and gas valve itself.

Could also check pilot tube and pilot burner to be sure they're clear and clean.


Thanks,
Robert
Last edited by Robert on Tue Dec 09, 2008 6:57 pm, edited 1 time in total.
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RE: Pilot problems on Coleman presidential II

Postby msufroggy » Tue Dec 09, 2008 3:34 am

Thanks, Robert. :) I will check the above things.

Also, I notice the pilot has a split flame, and from what I read could be from a dirty pilot tube? You did mention that, so we'll go from there.
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RE: Pilot problems on Coleman presidential II

Postby Robert » Tue Dec 09, 2008 7:00 pm

Hi,

You're very welcome, happy to help. Let us know please what you find.


Thanks,
Robert
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