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Old 03-24-2014, 06:07 AM   #1
stan g
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Join Date: Dec 2013
Location: buffalo ny
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suburban furnace

just got rid of my jayco fifth wheel and replaced it with the Montana 3670 RL while getting it ready in for the camping season had the furnace going ,ran out of propane switched to second bottle, when I went to re- fire the furnace kept getting a terrible whooping sound out of the exhaust it sounded like the igniter was continuing to go on and off And furnace tried to fire. Never had this problem with my jayco, ran stove burners thinking it might be Air in the line, continue doing it for least five or more firings any suggestion on how to cure this problem or what might be the cause
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Old 03-24-2014, 08:51 PM   #2
JRTJH
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It may be the safety valve in one of the pigtails. Turn off all your tanks, disconnect both the pigtails, then reinstall them and turn on your tanks SLOWLY !!!!! There is a safety valve in the pigtails and a large leak valve in the tanks that will activate if the flow of propane is "too great". The purpose is to prevent a major gas leak in the event of an accident, but if you just hook up a tank and rapidly open the valve, you may activate one of the safety features.

To reset them, you have to "deactivate" them by disconnecting and starting over. It sounds like your first tank was working OK, but when the autochange regulator switched to the full tank, something triggered a safetly valve. It may have been triggered when it was initially turned on "back when"

Hopefully this will get you going again. It's most likely not a problem, but a design safety nuisance
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