Hello My name is Ian ~ I am not on the site constantly so please be patient whilst waiting for responses to you queries ~ would you kindly let me have the model number of your appliance please. Secondly are you able to use a multimeter?
Hi Ian, model no:RM7291 and yes I do have and can use a multimeter.
Hi again, I cannot see your attached breakdown of the appliance on your page or in your email. i cannot see a way of easily removing the fridge from its housing to gain free access to the heater but I can see the heater and services going to it when I remove the vent covers from the outside of the caravan.
http://www.leisurespares.co.uk/files/rm7291.pdf ~~ try this
you will have to establish if you have power going to the mains element, remember you have two one at 12v the other at 220/240v.