On our last trip a 4 months ago everything worked perfectly. Went to turn the fridge to propane this weekend before we left so I opened the tank and turned the stove on to get the air out of the lines. Nothing came out after a few seconds. I went and closed the tank, opened it really slowly, nothing. I unhooked the tank, took it off, yep it's almost full. Hooked it back up and had flow to the stove. Great I thought. Went to start the fridge and it wouldn't light. Went back to check the stove, back to nothing. Same on the furnace. Swapped tanks to see if it was a tank issue and still nothing. So I am looking for some trouble shooting tips. Can you give me some trouble shooting tips on what to do and look for tonight? I plan to open the tank painfully slow tonight to see if that was the issue. I know my lines were probably all empty since it sat for so long, does that matter?