Crossroads rv control panel red light11/16/2023 ![]() After agreeing to pay the fee myself and requesting that the dealer record the before/after gap dimensions the dealer performed the service. I finally managed to get all parties together on a phone call where the dealer agreed to widen the gap -for a typical furnace service fee. Unfortunately the manufacturer was 1200 miles away and widening the gap would require removing the furnace from the trailer. Neither the local dealer nor Suburban were willing to agree to widening the spark gap. He indicated that the spark gap needed to be increased. Luckily, the trailer manufacturer had a service rep that had encountered this issue previously. The furnace DSI would click and there was enough gas pressure. The stove burners, oven and hot water heater all worked fine. I did several test runs to verify that this was an elevation issue. The furnace would not light above about 7,000 ft elevation. My brand new (in 2017) fifth wheel with a suburban furnace had a different problem that neither the local dealer nor Suburban seemed to know about. We replaced the igniter and the circuit board with no luck. The blower works and it will try to light 3 times before shutting off. I have a 2010 Coachmen Catalina with a suburban (SF-30F) gas furnace that will not light. If you are interested in becoming a member, please click on the offer below: With your membership you will also receive discounts on products and hundreds of hours of Premium content. By becoming a member, you will have access to our expert knowledge. Great question! The ‘Ask an Expert’ section is currently for members of our online community. The battery is brand new and has been checked. Won’t light when running off just the battery. None of the igniters work in the camper unless hooked to electricity. ![]() To get started, please send the email associated with your paid membership. I would be happy to send your question off to the experts. Great question! The ‘Ask an Expert’ section is for members of our online community. The gas works, the stove lights and the blower works but it’s blowing cold air. Δ 309 Responses to “What to Do When a Gas Furnace Won’t Light”
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