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Old 10-17-2015, 12:14 AM   #1
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Propane shuts off after 2 minutes below 50 degrees

Spent first night in brand new Forester MBS on Tuesday. Furnace quit during the night. 40 degrees out. Started generator and propane stove top. Ran for 2 min. and gen stopped and burner flame went out. Repeated several times with same result. Called dealer and they wanted us to come back in. Drove 90 miles and gen and propane burners worked fine. (then 55+ degrees out) Service person had not heard of this problem and could find nothing wrong with propane tank/reg. Took MH to wedding tonight (Fri) and are planning to sleep in it. 40 degrees again and having same issues. Gen and burners quit after 2-4 min. Will call dealer in AM.
Anybody have this issue? Bad regulator, kinked line? Why did it work in warmer weather?
Glad we have warm blankets for the night.
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Old 10-17-2015, 12:24 AM   #2
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I had the same problem years ago in my Winnebago. You have moisture in the propane tank and it will freeze up the regulator at 40 degrees. I got a hint at the time from someone on another forum. Try pouring warm, not hot water on the plastic regulator cover. It will defrost the regulator for a time. Do so at your own risk!
Cure was to find a propane distributor who can inject methanol into the tank. It will pickup the moisture and it burns up. Had it injected and no freeze up ever again.
Cause was the tank was not properly purged prior to initial filling?
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Old 10-17-2015, 09:56 AM   #3
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very good answer. Yes, moisture in the tank is your problem. You can fix that easily at any propane supplier in the northern statesor Canada. They are well aware of this problem. Good point is that it is a lifetime fix !
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Old 10-17-2015, 11:33 AM   #4
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It was impossible to find a propane dealer here in SoCal that does the tank injection. Found a dealer on my way to Yosemite in the sierra's. Shouldn't be a problem in Minnesota.
By the way, venting the tank will do nothing to remove the water. The cooling temperature of the escaping propane will cause the water vapor to condense and drop into the liquid propane and to the bottom of the tank. Ever see a ring of frost around the bottom of a propane tank? It's a waste of propane. That's what a SoCal dealer did. Costly and didn't solve the problem.
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Old 10-17-2015, 11:49 AM   #5
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Thanks for your help. We will try that and post the results.
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Old 10-17-2015, 12:57 PM   #6
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Is your generator propane?

One point of caution, if your generator runs on the propane, you may want to call Onan and ask if added mixture of methanol to the propane will affect the generator or warranty. Explain why you are adding it because of moisture.
Perhaps others here can comment if this isn't necessary and it will just burn as normal.
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Old 10-17-2015, 12:59 PM   #7
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One other thing to try is to take the tank and smack the base square on the ground. When they fill the tank some times the auto shut off float sticks shut. This happens to me quite a bit. Smack it 3-4 times and hook it up and try your stove. Not saying this is your problem but its worth a try.
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Old 10-17-2015, 02:34 PM   #8
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propane mixture

Isn't the amount of butane in the propane gas different up north, to help stop some of the low temperature problems. I was told if you fill up in the south, you can have problems in the colder months as you go north.
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Old 10-17-2015, 09:08 PM   #9
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I too had the problem with moisture in the tank on my 2015 GT. Dealer purged and refilled tank. He said that it came from factory that way. One way you can confirm what the others are saying it to look at the regulator itself. (Remove plastic cover if necessary.) If there is an excessive amount of frost on it, that's likely to be due to moisture in the tank. (Some frost is normal since propane absorbs heat as it expands.) As a temporary solution, when camping last January, I put a light bulb right under the regular. It was just enough heat to keep it from freezing.
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Old 10-17-2015, 11:36 PM   #10
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Quote:
Originally Posted by moondog2000 View Post
One other thing to try is to take the tank and smack the base square on the ground. When they fill the tank some times the auto shut off float sticks shut. This happens to me quite a bit. Smack it 3-4 times and hook it up and try your stove. Not saying this is your problem but its worth a try.
Can't, it's a motorhome with a fixed tank.
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