Purchased a new fifth wheel 2 months ago been in the shop for numerous things, they are telling me to leave propane tanks open for them to work correctly , the tanks don't empty out completely
I have 2 propane 'cylinders' (tanks are permanently mounted) with an auto changeover regulator.
I NEVER have both valved in.....just the way I do it.
In service tank will empty cause when I go fill it it takes 7.2 to 7.5 gallons to refill. (30# cylinder---4.2#/gallon)
I personally think dealership is blowing smoke and has given you a 'band-aid' fix for a faulty regulator. How 'not empty' are your cylinders when you refill?