WFCO Fan Thermostat fix

All of the 8955s I've seen run the fan based on current sensing.

whymelord wrote:
Describing the problem: it is the well known problem of the fan running almost constantly with little load. And after a couple of days it sounds like it's revving up and down at low load. I may have mistakenly said it's a thermostat problem as now that I think of it the fan activation is based on converter DC load, correct.

I have a WFCO 8955 in my current Freedom Express and had one in our previous KZ Spree ... based on your description I'd suggest your converter fan is working just as it should. You'll likely never see this converter go into a bulk charging mode at it's rated 14.4 volts but few of us who own this converter see this anyway so as long as it's otherwise outputting I'd forget about it and only swap it out for something better if the WFCO actually fails.

What is good amps? I think fan comes on above 8 and off below 3. Approximately.

Battery is good. Good DC amps from the converter. Did all of the troubleshooting as found in the forums. Model is WF-8955PEC but no S/N found on the faceplate. Any idea where I can find it?

Thanks.

Could be a battery going bad. Disconnect battery to test. Have you measured the WFCO amps?
LED lights will also cut load and reduce the fan run time.

What is the battery condition? Try disconnecting the battery, does the fan stop?

Unless you supply the exact MODEL # and Serial # there is no way to properly answer your question

Thanks for the quick replies.

Describing the problem: it is the well known problem of the fan running almost constantly with little load. And after a couple of days it sounds like it's revving up and down at low load. I may have mistakenly said it's a thermostat problem as now that I think of it the fan activation is based on converter DC load, correct.

I know these machines are the bottom of the barrel for converters, but a couple hundred dollars in the USA for a good PD set is over $350 here in Canada.

I like the 120v fan idea. I will be looking into that. In the mean time, if anybody has any ideas about what electronic component replacement part may be helpful I'd appreciate it.

Thanks again.

My Whiffie needs a fan of even greater CFM 24/7

Measure fan. Go online buy a one hundred twenty volt AC fan and connect it to incoming power. Inadequate cooling is maybe reason number three out of 55 weak points of this converter.

Go with a ball bearimg not sleeve bearing fan.

whymelord wrote:
Good day all.

I've been searching through this and other forums looking for a fix for the bad cooling fan thermostat on my WFCO 8955 converter with no luck. The converter is putting out power properly (as good as the cheap WFCO can) and I know the best thing to do is to replace the whole think with a good PD converter, but I can't rationalize spending the money at this time if I can get my soldering iron out and replacing a part or two.

Other than "throw it out" or "put it on the bench" does anybody have any advice/knowledge about how I could fix this puppy?

Thanks for any and all comments/help.

You might start by describing the problem. Is it on and not turning off? Is it off and not turning on? What is it doing that leads you to believe something is wrong?