The auto-swtich regulators are somewhat troublesome. There are several posts about them.
Also, I ran into a totally plugged line hose from the tank to the regulator on the driver's side. Apparently came that way from Keystone. It would feed fine from the passenger side through the auto-switch regulator and did so till the tank went dry, then the frig stopped working. Wondered why I never seemed to use any propane from the driver's side tank.
Put 130 psi air through the line hose, no go. New hose for $15, all good and no problems since.