Fan running at fuse box

[Frankandjane]

I have a Thor four winds 2017 rv class c. I noticed that a fan? Is running at our fuse box. I never heard this before. We are plugged in at campground electric. Is this normal? How do I get it to stop? Thank you for any help !

[16ACE27]

It's the cooling fan for the 120 VAC to 12 VDC converter. t will probably go off once your batteries are charged and you turn off the lights.

[Kev]

Originally Posted by Frankandjane

I have a Thor four winds 2017 rv class c. I noticed that a fan? Is running at our fuse box. I never heard this before. We are plugged in at campground electric. Is this normal? How do I get it to stop? Thank you for any help !

It’s normal, not the fuse box. It is on your converter/charger, probably a WFCO.
It is cooling the fins.

[Steve70605]

The fan is the cooling fan for your inverter most likely. If you are plugged in to shore power there is no need to run the inverter. Turn it off and the fan should stop.

Hope this helps.

[petefoss]

At the fuse box on mine it's the converter cooling fan. That said when on shore power with the inverter off, it's fan still runs occasionally.

[Frankandjane]

Thank you all for the help! It no longer runs since I shut the coach battery to storage on shore power!

[thor293]

Originally Posted by Frankandjane

Thank you all for the help! It no longer runs since I shut the coach battery to storage on shore power!

You shouldn't do that. The converter wont have anything to control the voltage if it doesn't see the batteries and it will most likely end up burning up the converter or devices it is running from overvoltage. Some converters can do it and some won't. Roll the dice I guess.