Timeking wrote:
Wow. Learned something new, surprising at my age (72) and the fact I am a degreed chemist with 37 years experience in environmental science. Just when you think you know it all ... you don't!!!
There is nothing in the Suburban manual that suggests the air/gas mix can be altered, and it doesn't look like it is possible.
Air adjustment may not be very obvious but there should be an adjustable "shutter" near the gas valve and orifice on the burner side.
Found a video that should be helpful on finding and adjusting the shutter..
HEREOf course, if your water heater has worked fine in the past with the door closed, something else may have changed to cause your current issue and I would be concerned that it has changed.
Typically a clogged orifice from dirt or spiders causes the most trouble with propane side of things so make sure you have cleaned the orifice and burner before making any air adjustments.
You are looking for a good all blue flame, any yellow color is incomplete burn which is typically improper air/fuel mix. But keep in mind the mix changes slightly when the door is closed.
