Originally Posted by EXTremist
AC works fine on any CG or home plug including a 110 circuit if kept on low. I have the 15K with heat pump unit on a 2013 3011DS. Haven't brought it in since didn't need it much this cooler summer up here but pretty much the only time I do want to use it is to run the AC so its been no good for me to even have it.
If the a/c is working on shore power then the Dometic unit is fine - but that can be verified with an amp meter.
A generator powering the a/c is at 50% capacity (a/c only, no converter/battery charger load or other 120 volt loads).
I suspect the generator is the problem. Do you know what voltage the generator is putting out both with load and without. The lower the output voltage the harder everything had to work (generator and air conditioner).
A generator sputtering under load is telling me a couple problems - fuel delivery/quality or intake air problems. Air intake would be the least culprit but still deserves checking.
A replaced fuel pump doesn't mean the problem doesn't happen with a new pump. Some owners have had multiple fuel pumps replaced.
The other problem would be fuel quality. There is no argument that these smaller engines hate ethanol. The higher the percentage of ethanol the worse the performance of the engine.
Ethanol is highly water absorbent so if the fuel is left to sit too long the percentage of water increases in the fuel.
Problem is, that water sort of separates and is hard to get it out of places like a carburetor bowl. It is things like running an engine at higher loads that stir up the water.
Another problem could be a fuel line restriction. Under normal loads there is sufficient fuel but under high loads the engine is starved. That was the symptom of the failed fuel pumps but it could be something as simple as a kink in the fuel line or even an obstruction inside the fuel line (a piece of rubber from the fuel hose).
Just a few things you can check