How to remove a caravan fridge for reair?

I have an ABI SPRINTER about 7 years old
The fridge wont work on electrics, works OK on gas
Checked the fuse and socket both OK
How do I pull the fridge out to replace the burner component?
6 screws on the front ,cant see any on the rear through the vents but it wont move much
Any caravaners with help?