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Old 06-16-2019, 07:26 PM   #1
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Location: Roaring Fork Valley, Colorado
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Suburban SW6DEL Deration

This weekend I was at about 9500 ft in CO and had issues with my HW igniting and staying lit. The Suburban manual indicates deration is needed as theyíre set for 4500. Canít find anything online but... go to a dealer or gas dude for an orifice change out. Weíre often at 8000 ft or so without issue. Question: it seems to work fine with the door open ( to the heater not the trailer , and I see some have used this as a solution. Is it OK to just run it with the open hatch in these situations??
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Old 06-18-2019, 08:38 AM   #2
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Having the door open to the WH compartment may help it run however it also can subject the unit to gusts of air that can blow out the flame. At that altitude you have a very rich mixture which can cause soot buildup in the burner tube and chimney once you are back to lower altitudes I would clean them to ensure proper operation.
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Old 06-18-2019, 09:05 AM   #3
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Thanks SeaDog. I bet I could rig up something to just open it up an inch or two at the top. I will add cleaning to my post trip to-do's.
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