Has anyone replaced the original under stove heater ( i believe it is an old Atwood) with a more recent forced air type heater. My 77 CO has this old model heater that I cannot get to work. Pilot comes on but does not light the main jet nor does the fan work. It is ancient. I am considering getting a used forced air heater from a newer camper and retrofitting my alaskan. I tried a Wave 3 in my FWC for awhile but he CO alarm would come on before long even with a window cracked open. So I am a bit unsure of a catalytic heater. What has been others experience?