Re: [DML] Re: Fan Fix Electrical Problems

["Ed B." <mr.pants@xxxxxxxxxxxx>]

When I got my Fan-Fix x2 module from Special-T, I found that the fans 
came on intermittently with jolts in the car, sometimes staying 'stuck' 
on.  I verified with hitting the shelf and it would sometimes turn the 
fans on and/or off.  I further confirmed this by physically 'shaking' 
the Fan-Fix  Box and noting that the fans would sometimes come on and/or 
off as well.

I opened up the box/case and saw that things are really quite tight in 
there, and that one of the relays had come un-glued from the case 
(they're just hot-glued in place), causing stress on it's attached 
components' leads, creating a short that would turn on the fan.  I 
carefully re-glued the relay and realized that still, some component 
leads were almost touching eachother.  I have an electrical background 
so I figured no big deal, and I inserted vinyl tape insulation between 
any leads I thought looked suspect, as well as SMT component epoxy to 
keep things in place so the problem would not recur, and it hasn't.

The unit is a great idea, but I have to say that it would benefit from a 
slightly larger enclosure and a little more attention to the routing and 
placement of the components.  Having said that, these are hand-made 
units, so I guess they're not all 'perfect.  John et al at Special-T are 
top-notch, so I'm sure they'd gladly exchange/fix any such modules.

- ed

1982 DMC-12 [11594]
1986.5 928S
1990 Coupe Quattro 20V


Lawrence Lormand wrote:
> Dale,
> I was told this never happened before by the maker, I've experienced 
> the same problem & was told it isn't the fan fix unit from Hervey, I 
> even sent it back to him & he said he couldn't find a problem so 
> when mine stayed on I hit the rear shelf & it would stop, but when 
> it melted the main lead to the battery while I was driving, I threw 
> the damn thing in the trash, cost me a rare left dark grey carpet 
> also from the acid lead I just replaced the carpeting to make the 
> car look good to. first my alternator catches fire, then My fan fix, 
> spend the dough & get melt downs for a fix. end up with wire fixes. 
> Should make my own & give them away what a guarantee
> Lawrence
>
>
> --- In dmcnews@xxxxxxxxxxxxxxx, "funkstuf" <funkstuf@...> wrote:
>   
>> The other day after driving 4984, the cooling fans were stuck on.
>> This has happened before, and I've alleviated it by unplugging the
>> fan fix module.  Sometimes they turn off on there own.
>> I went into the house for a little bit.  When I came out they were 
>> still on. I also had the fan fix module from Special-T.  The fuses 
>>     
> on 
>   
>> it were quite hot.  One was melted. I don't believe that initially 
>>     
> it 
>   
>> was due to the fan fix module, I just think it got too hot with 
>>     
> them 
>   
>> sitting there running.  Is there another relay that sticks or 
>> something that causes these to stick on?  Any ideas?
>>
>> Dale Funk
>> #4984
>> #941
>>     





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