we have a thetford n3150 fridge freezer,it works perfect on gas and battery but stopped working on electric, showing as code 8 on lights, we changed heating element and it worked for 2 days then stopped again showing same code, checked all wires got it working for 1 hour then it stopped again now cannot get it working at all still showing as code 8 on lights, would this mean element has packed up again or does powerboard need changing does anyone have any clue as to what is happening here tnx in advance