Have you checked that the red gas valves are in the open position?
And if your van is fitted with a Truma bulkhead regulator and has a yellow test valve, make sure it's open with the lever in line with the gas pipe.
Quote: Hebridean wrote in post #1
Is the fridge igniter audible?
You may be able to hear the igniter with the fridge door open but should definitely hear it sparking at the fridge burner on the right of the lower external vent.
If the battery was corrode there's a good chance the switch terminals are corroded too.