Hi all have a thetford N604M.3F which works fine on 240 power & Battery when driving but on gas it ignights and gets cold then when up to temp it will not restart and everything defrosts turn to high & it freezes every thing. Had gas checked & all cleaned & pilot flame stays on but not getting cold.Thetford said need aftermarket kit to solve problem of the fridge as it is a fault in the fridge but at my cost not theirs Any ideas please.