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Old 09-21-2021, 11:44 AM   #1
jonbarck
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Join Date: Sep 2021
Location: Tacoma
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Furnace fan

I own a 2021 38í BH Sprinter and when I go to turn on the furnace the fan cycles on and off every few seconds and then stops completely. Both propane tanks are full and there isnít any air in the lines. My family and I live in this full time and have no way to haul it in for service so any help is appreciated.
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Old 09-21-2021, 06:43 PM   #2
bobbecky
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A common problem that affects furnace operation is when you get your propane cylinders filled, when after reconnecting the propane lines, turn on the valves very slowly, as rapidly opening the valves can cause the check valve in the big nut that connects to the cylinder to close off, which severely restricts the flow of gas. This is a safety device that cuts the gas flow if a line breaks. Turn off the valves on both cylinders, remove and reinstall both connections at both cylinders. Then, slowly open each valve. After doing this, try your furnace again. Hopefully, this resolves the problem. The photo is a cutaway of the valve inside the big connection nut.
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Old 09-22-2021, 06:44 AM   #3
jonbarck
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Thank you Bob for your helpful response. Unfortunately the propane never ran out, the fan just started doing this short cycling between normal operation. One minute it’s was working fine the next it started this and I can’t figure out why. I even tried unplugging from shore power turning the battery switch off for 15 minutes in hopes it would reset itself.
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