HOW CAN I FIX MY CARAVAN FRIDGE ?

You do not specify whether the problem is with the 12v or 240v supply to your fridge.
It would be most unusual for both heating elements to have gone. Also both elements use totally separate wiring circuits and switches.
There is only one thing to do- take the fridge out of its recess to gain access to the back (assuming you are competent with the LPG connection). Do some circuit testing and check out the wiring.
You might as well clean out the gas flue tube and clear any dust and debris from the gas burner while you've got it exposed

Cledlyn
June 2009