wgriswold wrote:
The trailer is 13years old and the flue has probably never been cleaned and that might be the reason for the carbon build up. I need to look at the flame to see if it is burning rich. I will remove the burner and inspect it when cleaning the flue. If the burn slots are degraded and enlarged that would cause a rich flame and carbon build up.
Thanks for bringing that up.
Observe the flame while it is burning. It should be steady blue. An occasional flicker of orange is ok. If it is mostly orange, or frequently orange, then you have a problem.
At 13 years of age, I would suggest replacing the burner orifice as that would follow the "cheapest part first" rule.