LP GAS ISSUE

You've pretty much ruled out a defective regulator and a pinched line.

One possibility is your tank contains butane, not propane, which stops "boiling" at about 32 degrees. Butane works fine in the summer, but not so well in cold weather. LP gas has to turn from a liquid to a gas (boil) for it to be available at the appliance. Propane boils down to a way down below "0".

Several vendors in the south sell butane or a mixture of butane and propane. You may have used all of your propane up and now only butane is left.

Look next to the regulator for an LP shut off solenoid. The LP detector could be shutting the fuel off if equipped.

No thermocouples.

Are there thermocouplers on the stove??

Understand on the caps - just lazy. No remote fill shut off. Just changed the regulator. I'm thinking that maybe the tank shut off valve is faulty. There is a little slack in the knob.

Do you have a remote fill shut off?
Slight residual LP in lines could be what you are experiencing.
Could be defective regulator.

Info: Capitol letters indicates that you are yelling!

IT'S A CLASS A DIESEL WITH A SINGLE TANK. CHECKED THE LINES FOR KINKS. TANK IS FULL. I'LL CHECK THE SHUT OFF. WOULD IT RESET AND COME BACK ON BY ITS SELF?

I would look at the propane safety shut off. It is shutting off the propane for a reason. Leak or a malfunction in the propane detector.

Kink in line would be my first guess If you switch tanks is it the same?