WFCO fan cycles frequently

Bill&Suze

We have still not dry camped in our '24 400 Boondock and have always had shore power in the camper. It's evening now, we've finished supper and have a number of lights on, the radio on and of course the refrigerator and Alde. The WFCO fan has been spinning a lot and perhaps this is to be expected. However, in the wee hours during the night it cycles on and off, typically after I hear the refrigerator start a cooling cycle. It is loud enough to be disturbing when asleep. I'm curious to know if it is normal. Does the WFCO really require frequent cooling down, assuming what I hear is a cooling fan?

Yoshi_TAB

Hi, Yes the could be normal.  The fan will come on both if the WFCO is charging the battery and / or if there are 12V loads being run such as a 12V fridge.  Hard to say if yours is louder than normal.  Mine has a very low hum but hardly noticeable .    An out of balanced fan could be louder ?

MuttonChops

Power Center Fan cycling is normal.  Item #2 in the image below explains in more detail.

I don't know the yr-24 TAB 400 Fridge brand/model number.  If a 12-VDC only unit then of course the Power Center convertor will be the power source while on shore power and the compressor start-up power draw could trip the cooling fan operation.  Also, on older model year 400 with 120VAC or 12VDC option Fridge some years had the Fridge hardwired to 12VDC so again the convertor is the shore power source.

Bill&Suze

Thank you @Yoshi_TAB and @MuttonChops, both your answers have clarified the situation.