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  #1  
Old 07-27-2019
jsreen06 jsreen06 is offline
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Default 85 pt36 lp furnace

Hello, so my 1985 PT 36 FAN ON THE LP FURNANCE UNDER THE DINNETTE SEAT DOES NOT EVER SHUT OFF . I'VE TRIED EVERYTHING !! I'M CONFUSSED . DOES ANYONE HAVE ANY IDEAS ? THANK YOU JON.
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Old 07-27-2019
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kg4rrx kg4rrx is offline
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Thermostat is set to off? Check all of them- including bathroom.
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Old 07-27-2019
jsreen06 jsreen06 is offline
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Hello chris, i have double checked all of them. I just don't get it.
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Jonathan Reen
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Old 07-27-2019
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The LP heat switch on the dash may turn the fan off temporarily. I hardly use LP heat but I believe it goes LP heat switch on dash -> thermostat-> heater. A couple relays in there too, of course. Lots of people traveling today and tomorrow. Someone a lot smarter than I am should be along soon.
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Old 07-27-2019
jsreen06 jsreen06 is offline
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Thanks chris I'll look for that.
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Old 07-27-2019
Frank W. Frank W. is offline
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Could the fan you are hearing be a chassis heater fan and not a propane heater? Check chassis heater thermostat.
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Old 07-27-2019
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Just checked my suburban heater operation. LP heat switch should kick the fan off. I'd be checking the thermostat to make sure its working then look for a bad/bypassed relay.
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Old 07-27-2019
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Quote:
Originally Posted by Frank W. View Post
Could the fan you are hearing be a chassis heater fan and not a propane heater? Check chassis heater thermostat.
Yes. Chassis heat fans should also kick off with the summer/winter switch I think- no matter what the switches at the heater itself do.
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Old 07-27-2019
chiplamb chiplamb is online now
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Power comes from a relay to each individual LP furnace, chances are a relay fused internally. Odd that the fan would continue to run since they time out if there's no fire.
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Old 07-27-2019
jsreen06 jsreen06 is offline
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Thanks chip , ill try to locate the relay for that furnace and test it
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