The Dometic RM3862 2 way refrigerator on my 1997 Holiday Rambler won't light on propane. I can light it manually, but it won't stay lit or light electronicly. I have been told that it most likely is a bad circuit board. Does this sound likely? I don't mind buying the part, but I don't want to buy a non returnable board if it is not the problem. I was also told that if I replace the board I must replace some other parts. Is this true?,and what parts were they refering to? Thanks for your help.