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niss1679 · 10-13-2005, 10:19 AM

Thanks and Thanks, I will check the electrical first, wouldnt that be nice, much easier to work on. If I do have to pull the unit out.I'll check the main oriface, Thanks for the advise. I may be able to look into it today after work, if not I'll be into it over the weekend for sure. I'll either let you know how I made out or be back with more questions.
Thanks again, Scott
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bhsl8 · 10-14-2005, 06:40 PM

Good luck Scott and let us know. Mine is now purring like a kitten.

Creampuff · 10-14-2005, 09:18 PM

Scott:
If your Suburban is an Nt22 model you best be advised to pull it out and check the 'crossover tube'. This has nothing to do with your current problem but there was a recall on some models because the rubber tube cracks and allows CO to mix with the fresh air intake which is deadly! It's an easy pullout- just remove any cabinet style in front (usually 2 screws) and then find the single set screw near the bottom after removing the cover. Detach the screws outside on the vents and the unit will slide out of the cabinet in one piece after disconnecting the gas line. Inspect everything - the crossover tube will be obvious at the back. If it's shot, the part is no longer available and you'll have to fabricate one out of a plumbing 'no hub' connector or the like. Good luck- your fan may need a good cleaning anyway.

niss1679 · 10-15-2005, 09:32 PM

Homecoming today at the college I work at so I didnt get much done on the AS. I'll be looking at the furnace tomorrow. Thanks for all the tips. The only thing I got done today is to put a coat of finish on the new cabinetry. It looks like if its not electrical, I'll probably pull the unit and and check everything you all suggested.
Thanks, Scott
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PS, I cant wait to take her out on her maiden voyage the end of the month!

Granny Ham · 03-18-2006, 06:38 PM

Hey there...it's old Granny here again with the 1975 Excella. Now it seems I have a furnace problem. The Rv dealer said it "needs a new gas valve, but they don't make them anymore." He also said that it comes on and the fan works, so the board is fine, just no heat. So my question to y'all is there a replacement gas valve out there for a unit this old and how difficult a job it is to replace?

Thanks for any and all advice & anyone can email me directly if you prefer.

Granny Ham

lewster · 03-18-2006, 07:44 PM

Granny,

Just because the fan starts when the thermostat calls for heat does NOT indicate that the ignition board is OK, The board does several things: start the fan so it can close the sail switch, open the gas valve to provide propane to the burner, maintain the valve open when it heats and close the valve when the thermostat is satisfied. Is this a pilot model?

If he did not independently verify that the gas valve does not operate, then I would question that assumption. The non-ignition could also be a result of a bad time delay relay (found in units like yours) or limit switch. All of the major components should be verified for proper operation.