duo therm furnace won't stay lit
I replaced blower motor in my furnace in my '87 Avion, since then the burner comes on and then goes out. It appears to be an issue with the air blowing back and causing the problem. I can remove the...
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Post the Model number of the furnace please. 1987---That year and around that Duotherm produced the 9000 series and took it OFF the market after a few years, because of intermittant staying lit. It was due to the CASE PRESSURE. A symptom was as you described, Works on the bench AND if you remove or slightly remove the case cover when installed, it lights and stays lit. IF YOU HAVE THIS MODEL, A REPUTABLE SERVICE COMPANY WILL NOT ATTEMPT REPAIR. It would be a waste of time and just cost the customer money. They CANNOT be repaired and be guaranteed to work. There are very few parts and Dometic has not supplied parts for over 20 years. The only sure fix is to replace with a compatible model that will fit in the space. Dometic used to send out NEW units under warranty and they sometimes failed to stay lit. Doug
