A/C Condenser Fan repair

[DancinCampers]

One of my electric fans quit. I found a replacement assy at the ORielly here in MO that looked the same. But it was a little shorter and the mounting holes were about an inch wider. I figured I could modify the MH bracket so brought it home.

I decided to try just swapping out the pancake motor and new fan blade. Perfect fit. Just had to solder on the old connector, the wire colors worked out to be the same, and was able to re-install my original frame.

The unit I bought was Hayden model 3680. Cost $59.99 plus tax.

Dan

[DriVer]

Thank you for sharing!

I was also considering the very same solution in the event that one of my fans fails. I saw something that I thought was very close here at the local Carquest. I would also make the rounds to my NAPA store as well.

You do definitely need 2 fans spinning up there.

[oemtech]

I think the WH part # is W8000087

[max49]

Quote:

Originally Posted by DriVer Thank you for sharing! You do definitely need 2 fans spinning up there.

Driver, didn't they discontinue the electric fans? If so, do you know why or what is different that they decided they didn't need them any more?

[DriVer]

Quote:

Originally Posted by max49 Driver, didn't they discontinue the electric fans? If so, do you know why or what is different that they decided they didn't need them any more?

max, The cool pack was redesigned so that the condenser did not need the auxiliary cooling. The radiator is much more compartmentalized like the UFO radiator which integrates coolant, transmission fluid and motor oil in the same core.

if you look in the RV Industry News or in the forum threads you should find an article I wrote about the new cool pack including pictures.

[max49]

Ok , I thought they just decided they were'nt necessary any more. I have a light that comes on when the fans turn on. When the AC is off the fans don't come on much, if at all except for a second at start up. as a mater of fact, I manually turn them on sometimes when I know I'm about to pull a long mountain pass. Don't know if that's necessary or even helpful or not.

[DriVer]

Quote:

Originally Posted by max49 ... I manually turn them on sometimes when I know I'm about to pull a long mountain pass. Don't know if that's necessary or even helpful or not.

Max, The majority of the cooling task that is accomplished by your engine is as a result of the main engine fan which is controlled by your FCA. Under such a load, the auxiliary cooling fans are automatically cycled to come on however they do not add significantly to the cooling process. The more air coming thorough the cool pack the more heat will be shed so in that light its a good thing. As we climb grades most of us will try to keep a 50~60 mph speed if we can. At that speed the grill work is getting a good amount of air.

If you are climbing an extreme grade at very slow speeds I expect that the engine temperature will begin to climb upward. If you are climbing a fair to midland grade at hi speed (70 mph+) I expect to see a slight increase in engine temperature. Both of these conditions apply a load which is inconsistent with a normal climbing rate which I expect would be between 50 to 60 MPH.

When I back my motorhome in off the street down my driveway my engine temperature starts to climb due to the fact that it's not getting a lot of air. If it gets too hot the auxiliary fans kick in and continue to spin until they've reached a predetermined low limit. At that point even with the key removed and engine shut down the fans will continue to spin until the ECM is happy with the cooling system temperature.

I hope that your aux fan circuit still has the ability to spin up on its own without the use of the switch.

[-Gramps-]

My condensor fan failed as well. It turns but it draws over 70 amps which blows a 30 amp fuse in the front CCM. This condensor is located on the side of the coach in the rear. This is the Aux ACC power fuse that I couldn't seem to figure out. Finally discovered that it blows when the AC is turned on and the condensor fan starts to turn. The AC works without the fan going down the road but at idle or a hot day, not so good I bet. It doesn't seem to affect engine temp. Not sure this condensor has anyting to do with UFO engine cooling. A new fan is on order. Right now I am driving without it connected as it appears to have not worked for some many miles now. But I have not used the AC very much. The UFO doesn't get hot up front unless it is a really hot day.

More about my last 4 days at the Workhorse rep in Richmond later.

[max49]

I hope that your aux fan circuit still has the ability to spin up on its own without the use of the switch.

It still comes on automatically, and has an indicator light so I know when it's running whether automaticaly or when I flick the switch. It does'nt come on very often automaticaly unless I have the AC on. Well, it probably will come on more often in the summer time. It always comes on for a couple of seconds when the engine is first started.
I'm curious as to how you know your engine heats up more when you're backing into your driveway. My temp gauge stays welded right in the middle, even tho it only make sense that it should heat up some when pulling as hard as it can at 30-35 MPH for 20 minutes or more consistently. Also, my fans have never stayed running after I turn the engine off, even if they were running when I turned it off. They can now, with the manual switch.
There was one time, climbing the Eisenhour Tunnel E.B. that the temp gauge pegged itself in the deep red. I stopped and turned it off and there was no indication that it was hot and seemed to be running and started right back up fine. The automatic electric fans weren't even running. I've come to the conclusion that the gauge was a fluke or another electrical glitch.
However, it was after this that I decided to put the manual switch to turn the fans on when I wanted to.

[DriVer]

Quote:

Originally Posted by -Gramps- Not sure this condenser has anything to do with UFO engine cooling.

=-Gramps-, Going out on a "BIG" limb here to say that the condenser fan on your side mounted A/C condenser has absolutely nothing to add or do with engine cooling.

This would also be my observation of Winnebago Models with side cool units. Forest River units have the condenser fan mounted slightly aft of the front axle in between the rails.

I am glad as I stated before that you've identified the problem and are on your way toward resolution.

[-Gramps-]

Thanks Driver. It looks to be a quick fix once the part is in. The guys at WH really helped out with this one. Oh and thanks to you for taking my call and providing me Eric's number.