The mechanic at the AC shop disconnected my condenser fan and said I need to get a new one. He seems to think it has some sort of problem that might cause issues with other electrics... I don't know the details nor have I checked it out myself yet, although I know it did turn on when given power for a previous test. Assuming he's correct, and also that I've decided to keep the belt driven fan for now... Is there an aftermarket replacement that is essentially plug in? Improved efficiency, etc would be a hopeful bonus...

 

I have never seen one fail so a good used one from Mark at 928Int would be a good move if there is really an issue with it.

 

I got a bit more info....basically it kept blowing fuses. In any case, I would think a newer design would be better, wouldn't it? Something like those FF Dynamics fans that people use to replace the belt-driven fan...an appropriately-sized one of those, installed as a pusher...wouldn't that be better? Or am I better off just getting a used one?

 

The FF Dynamics fan will replace both fans. No need for an AC condenser fan.

Mine works absolutely great even in 95 F Houston stop n go traffic.

Perfect coolant temps and ice cold AC. Easy to install and not too expensive.

Just my 2 cents...

 

Eventually I want to do something like that, but replacing both fans seemed like more work...hmmm....I guess if that's where I want to end up anyway, I should either just do it, or grab a used stocker temporarily.

Well...the first thing is going to be get my existing on on the bench and see what's up...

 

And check the wiring as well....

 

Right...good point. The fuse-blowing fun might not be the fan at all...

 

Hopefully you have the right fuse rating installed? - fans usually take quite a few amps- no idea what the particular fan in question should take as I am not familiar with your model.

Rgds

Fred

 

Or,
http://www.928motorsports.com/installpdf/auxfankit.pdf

Not endorsing, just FYI.
I sourced an aftermarket for my euro just be comparing flow rates, amp draw and weighting by reviews/reputability. Newer fan was quieter, drew fewer amps and kept closer control on engine temp. Years ago, don't have make/model. You can find plastic adapters to match the harness online, if wanted.

or
https://rennlist.com/forums/928-foru...ml#post6190180

 

Well, I attached the fan to a 9V battery just for kicks, and it turns...slowly of course, but it seemed to work fine. Checked the fuse...they put a 30A in there...supposed to be 25A...I'm pretty sure I had a 25A in there before, but either way, it's not a lower-rated fuse.

Now, I have an issue with that radiator thermo switch...the connectors simply don't stay on very well, so to get it out of the loop, I jumpered the wires. Turned on the car, no AC, fan came on, ran strong, no blown fuses. Turned on the AC...same result. Let it go for a bit, everything seemed great.

I suppose maybe there could be something in that thermo switch causing a short to ground? Not exactly sure how because that thing shouldn't be grounded at all, I don't think. Or, possibly it will just eventually blow, for some unknown reason. I will give it some time, and see. I ordered a replacement thermo switch but I can't find it. I guess I should go through my pile o' stuff...

 

Jeff,

I know it's a long long time from your last message - however I just noticed this same behavior on my 964 - I was listening for the AC condenser fan to come on and it did not - checked the fuse ; and blown . replaced the fuse - clicked the AC on button fuse blown again ; played a little with the fan by pushing it manually very stiff ; played with relay ( several times - manually activating it and slowly forcing it to turn ) and it finally stated turning again as if nothing had been ever wrong . ( I too let it run for a while 5 - 10 minutes after wards with no issues ) .... Did your fan ever give up & be replaced finally ... or did you never have a problem with it again ?

Farbod

 

Ditch both fans, get a Ford Contour replica dual fan assy. and you'll have a much cleaner and effective setup. Just did mine this winter, see the pics.

 

I apologize for never putting a conclusion in this thread. Basically, with the thermo switch replaced and the proper fuse, it's worked perfectly ever since. For my mechanical fan, I do have a fan clutch that's not doing such a great job anymore, and I actually have a replacement from Roger, but I've never got around to swapping it. I had a slow leak and was low on fluid, so that particular problem for which I was blaming the mechanical fan wasn't really the fans fault either. The whole system has not come close to overheating, even in South Florida summers, with everything working properly (even given the not-great fan clutch).

I do think the dual fan retrofit shown above would be a good option if you have to replace parts.

 

Thank you for being so awesome to reply !!!! I have checked the fan several times now and it still runs without blowing the fuse and actually very smoothly if i may say so ...... I really don't know why it may have gotten "tiered" and stuck in the first place. I wish I could do the double fan setup - the thing is / in a 964 there really is only space for one of them - a little different setup vs the 928 944 etc ; I think i will await one further fuse episode and then change at that time / last thing anyone wants is a nightmare burned wiring issues ( nightmare I would think ) .

Thank you Jeff / thank you Jan ( i grew up in Ottawa )

 

Funny that this just came up and now today, while giving my AC an extra charge, I stupidly got a rag sucked down into the condenser fan when the fan came on. It was just momentary, but it was enough to blow the fuse. So if something causes extra resistance there, it won't take much to blow that fuse. I replaced the fuse (and moved all the rags far away) and it's working fine once again.