[flybouy]

Originally Posted by ken56

No inverter here. I need shore power to have 110. By your description it sound like its running normally except I have never heard it change speed. Its a constant speed with no variation. My other rigs did though and again, that is what peeked my curiosity. I honestly think it is related to the AGM house battery. We are most always plugged into shore power and that battery never really cycles. Not sure but.....

Thanks for the discussion.

Simple test would be to remove the ground battery cable with all lights / appliances off and see if fan speed changes.