2007 Mountain Aire: Aqua Hot 450-D Blowing Black Smoke

[Utah_Jenkins]

Hi,
When the Aqua Hot runs it blows thick black smoke. I am concerned there is the wrong mixture of air and fuel and that I am taxing the system. Please advise.

Background:

I purchased my Newmar in August, love it and have now driven across the US. When I purchased it the Aqua Hot had been "Serviced" before I picked it up. It creates hot water, when I use the furnace it works fine and the lights register in the zones and no issues! I also added more diluted Boiler Antifreeze a few days ago and have studied the forums.

[tmh1953]

My oasis started blowing black smoke it was caused by exhaust pipe partially plugged with dirt dobber nest.

[Utah_Jenkins]

Pulled the extension and exhaust pipe and.... debris was blocking. Cleaned debris out with a snake and a wire brush, solved the issue. Water heating and now is a simple clean exhaust. Thanks for the “dirt dobber tip” I owe you a pint as you saved me a trip to Grand Junction for the closest aqua hot service (4+ hrs)

[tmh1953]

Your welcome. I put a fine wire screen over exhaust and secured with a hose clamp. I also put screen over generator exhaust just in case one of those pesky dirt dobbers tried to move in.