When we first got our 36FL the weather was cooler so used the furnace to heat the trailer overnight. I only run off one tank of propane at a time then switch over to the full one when the fist one runs out. The first time I did this it worked fine. I closed the valve on the empty tank, switch the regulator so the arrow was pointing to the full tank, then slowly opened the valve on the full tank and everything worked as expected. Early this morning the second tank went empty so when I went out to repeat the process for switching tanks but this time I couldn't get the furnace to light. I turn the range top burner on to purge the gas line but there was no fuel coming out.
I worked the regulator valve back and forth a few times hoping it was a stuck diaphragm or something but still nothing. The I swapped out the empty tank with the full one and that seemed to do the trick but still didn't solve the problem.
When I was outside looking things over I could smell gas so I checked out the full tank and the connections but all was fine. I went to the other side and discovered gas flowing out of the gas line. I didn't connect the empty tank to that side because I was going to get it filled.
I have used this method for several years on our old trailer and never had gas flow out of the unattached line.
Do you think I have a bad regulator or is there a problem with my method. The owners manual says to switch the valve to the full tank, which I did, but it doesn't say what to do should that not work than that.