Inverter fan

[jay67]

I hooked my Jayco Qwest to shore power for the first time.When I entered the camper I heard a noise which I traced to the inverter/battery charger . This ran the whole time the camper was plugged in. I never had a travel trailer or pop up that did this. My Jayco pop up doesn't have a fan. Is this normal for this to run the whole time ? The little bugger is noisy/

[Vicr]

Its a converter/charger. 120v to 12v. An inverter is 12v to 120v. The fan runs to keep the converter cool when under load. It shouldn't run when there is little or no load.

[mike837go]

The fan will run for several hours. Until it's satisfied that the battery is fully charged.

[Seann45]

With the power turned off give the fan a shot of WD 40 then give it at least 1/2 hour before you turn the power back on...

[pconroy]

Not sure about the WD40 recommendation but...

Our converter fan runs at times too.
Noticeable when the coach is dead quiet.


I think our Xantrex inverter has a fan but I've never heard that one, yet.

[hoppers4]

I also got tired of the noisy fan so did a bit of investigating. I opened up the enclosure under the bed and after a bit of digging around realized that the fan noise was coming from the inverter and not the converter. The fan doesn't run continuously but comes on for a couple of minutes every 10 minutes or so. I read somewhere else on this forum that the fan runs to cool the inverter's auto switch. This switch is used for detecting loss of shore power and then switching to supplying 115VAC from the inverter.

[jay67]

Thanks for the follow ups.I plugged it to shore power and left it hooked up all day The fan never shut off. I also noticed a slight pop when I plugged into the wall outlet in my garage,like when you plug in something and left it switched on. Starting to wonder if I have an issue with the converter/battery charger ?

[hoppers4]

That pop you heard was the slight arc from the plug as it started drawing current. My MH does that every time I plug it in due to the converter powering up. I just consider it normal and don't worry about it. The only way to prevent it would be to turn the converter off before plugging in the RV. I don't think it's worth the bother.