My furnace isn't heating the house today..it is a propane forced-air furnace..and the burners will not stay lit. My furnace is a Conquest90.. It is high efficiency furnace, 90,000 btu. and 93.5% efficient..new in 1995. I tried to trouble shoot myself..thermostat works fine..purge motor works fine..electronic ignitor works fine..burner lits up fine..BUT the burners immediately go out at the precise moment that the blower motor kicks on. Again.. 1. thermostat works fine. 2. purge motor works fine. 3. electronic ignitor works fine. 4. burners light up fine. 5. ..problem area..burners go out at precisely the moment that the blower kicks on. I will heat with kerosene this weekend if I cannot figure this problem out..and call the repairman on Monday. But I'd like to do it myself and save from paying a hefty service call. Anybody have any experience or suggestions about why the burners would go out at the precise moment the blower kicks on?