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Old 11-06-2018, 07:50 PM   #11
Sailorpat1954
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Well general RV said my furnace worked fine on their bench . I picked it up and installed it and did not work.
I will call them and give them the trailer and them figure it.
I will post what the end result is.

Again thank you everyone for your help

Pat
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Old 11-07-2018, 04:32 PM   #12
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Ok furnace is working fine. I switched over to the other full propane tank and it fired right up. I guess there was enough propane in the first tank to light my stove and oven. But not enough pressure or something for my furnace to run.

Anyway itís working fine and once again Thank You all for your help

Pat
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Old 11-07-2018, 05:28 PM   #13
OregonDuck
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Ok furnace is working fine. I switched over to the other full propane tank and it fired right up. I guess there was enough propane in the first tank to light my stove and oven. But not enough pressure or something for my furnace to run.

Anyway itís working fine and once again Thank You all for your help

Pat
Thanks for the update! New to my RV, and didn't know a low LP tank could cause issues with the furnace. Good to know!
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Old 11-07-2018, 06:02 PM   #14
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Ok furnace is working fine. I switched over to the other full propane tank and it fired right up. I guess there was enough propane in the first tank to light my stove and oven. But not enough pressure or something for my furnace to run.

Anyway itís working fine and once again Thank You all for your help

Pat
Just a thought; your furnace stops and you have to do "stuff" to make it run again. Are you trying to leave one propane valve on and one off on your tanks? Then, when one runs out of fuel you then turn on the other tank? If so, you always run the problem of what you describe. I leave both on all the time; check them occasionally and more often when it's cold.
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Old 11-07-2018, 06:12 PM   #15
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Also when opening the valve on the tank be sure to open slowly or the safety shut off will trip & you'll get no gas. To cure this close the valve, loosen the hose fitting from the tank, reconnect, then open slowly.
One other thing, a low tank should not affect furnace operation, it's regulated down to about 30 psi before the furnace, so if there's anything in the tank the furnace should function properly.
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Old 11-07-2018, 08:27 PM   #16
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The gas pressure the regulator allows to the appliances, water heater, furnace, and stove/oven is 11" of water column, which is a lot less than 30 psi, maybe closer to 1/2 psi. So, If both tanks are connected and valves are open, the auto switchover valve on the main regulator will switch to the full tank soon enough to maintain gas flow to keep things working. We've been over six years full time and never keep one tank closed and never have to get up in the middle of a very cold night to go outside to switch tanks.
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Old 11-08-2018, 03:27 AM   #17
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Ok I understand and I will open both tanks. And yes getting up at 3:00 AM this time of the year and running out side sucks lol.
I always have a spare tank with me anyway.

Thanks guys
Pat
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Old 11-08-2018, 03:37 AM   #18
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Pat, also, not sure where you are camping at, but as temperatures drop, propane and other gasses drop in pressure because the molecules slow down. Keeping full(er) tanks reduces the space the propane fills and helps keep the pressure up better. YMMV, but that's another thought on the issue.

You won't see this as such a bigger issue in warmer climates or during May through September.
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Old 11-08-2018, 08:28 AM   #19
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Two schools of thought regarding dual propane tank valves and auto switch over regulators. They are nice but I prefer to manually select one tank. Then when itís empty I know for sure the other is full.

They auto switch over regulator should run one tank and then switch over to other full automatically but then youíve got to keep tabs on whatís full and whatís empty.

Iíve never had a stove or furnace not lite when I manually switched over.

And the other way is fine too... just depends on your flavor.
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