Originally Posted by lanzjx2
Yes, I imagine that the tank could be full and the gauge could be wrong. By use I figure I should be near empty. I will have to crawl under and see if I can get to the tank to check the sensors and try to figure out how much propane is in the tank.
Although it will be a wet experience with you lying under the Interstate to do it, one quick way to determine the actual level in the tank is to run hot water over it. Then feel the tank where it's wet. Above the propane level will feel hot, but areas below the propane level will still feel cool. The water warms the metal, but the propane chills the metal faster than the water can warm it.
It's not an exact measure, but you'll at least be able to estimate the level pretty closely.