First day out on our most recent off-grid 11 day camping trip the Dometic fridge in our Scamp 19 wouldn't turn on with gas.  Clicking aplenty, lots of propane, new regulator last year, and on the previous trip with electric hookup we had no problem; but now no ignition.  Turned it into an icebox for two days then opened the outside fridge compartment and removed the chimney baffle to see if I could see anything wrong.  Turned out the wire feeding the piezoelectric had sagged too close to a metal tube, and the spark was occurring there instead of at the piezoelectrode tip.  One ziptie and all was well.