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Old 08-06-2011, 10:29 AM   #1
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2009 22' Interstate
Free Union , Virginia
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LP airlock

I recently went to use my 2009 Interstate gas cook top and although I have full LP tank, cannot get gas to cook top, nor upon checking does gas heater come on. Airlock?? I there a way to check or correct this?

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Old 08-06-2011, 10:59 AM   #2
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Corona , California
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Originally Posted by Bruce Gordon View Post
I recently went to use my 2009 Interstate gas cook top and although I have full LP tank, cannot get gas to cook top, nor upon checking does gas heater come on. Airlock?? I there a way to check or correct this?
An airlock is impossible.

Are the tanks turned on?

Is the regulator working?

Are the stove or furnace LPG shut off valves, turned on?

Is the water heater working?


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Old 08-06-2011, 11:00 AM   #3

2003 25' Classic
Zanadude Nebula , WNY
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Have you tried using a butane stick lighter?

Sometimes it's the only way I can get ours to light after filling the tanks.
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Old 08-06-2011, 11:30 AM   #4
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Dewey , Arizona
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I am not familiar with the tank setup on the Interstate, but modern trailers tanks have an auto shutoff valve to stop the flow of gas if the system has an open line. You can reset the shut off valve by turning off the flow at the tank and then turn it back on (slowly). Then light one item at a time to verify the operation.


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Old 08-06-2011, 11:41 AM   #5
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2005 19' Safari
Phoenix , Arizona
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If you haven't used any of the gas appliances in awhile, it may take several seconds to purge the air from the lines and let the propane work its way through the lines to the burners. The easiest way is to use a butane lighter like Robert Cross has shown above to light the appliance the furthest away from the tanks; although, this may not be needed if you have appliances that light electronically. This could take several seconds and numerous attempts. After that appliance lights, the others (closer to the tank) should start quicker, because the line is now full of propane.

On our Bambi, the water heater is at the end of the line; so we light it first, when taking the trailer out after several weeks of storage. It usually takes 2-3 attempts (electronic start) and a minute or two before it lights. If we try to light the stove first, it can take 10-20 seconds for the burner to light. If we light the hot water heater first, the stove lights in just a second or two.

As Andy says, airlock is impossible, since the system is pressurized with propane. You just need to purge the air out of the lines. However, you do need to make sure that the propane is turned on and flowing to the appliance.
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