He probobly has it setup wrong,mine was setup wrong at the start and wouldn`t feed diesel into the heater.There is a return fuel line that has to be used to feed the diesel,on first glance it looks as though you have to use the other fuel line is this the problem he had,there Webasto and are on par with Rolls Royce as far as on board heaters go.Mine goes on in the morning and stays on without any trouble at all.