Camper dropped off for inspection and some work

I dropped the camper off and the dealer/shop to have it’s annual inspection, check the roof for cracks, and look at the fridge, which has been acting funny lately.  The switch over from electric to propane is not working correctly or the light on the refrigerator is wrong.  The check gas light keeps blinking when we hitch up to hit the road.  I’ve done the usual procedures to turn on a burner or turn the heater on to clear the gas line of any air bubble that may be blocking the line, but not 100 percent of the time has it been working lately.