When I would turn the fan speed ****, I found the speed to to be erratic. So, I took the unit apart and discovered that the shaft connected to the back of the fan control **** rotated a little variable resistor. I connected a ohm meter and turned the resistor instead of being a linear rise or fall, the needle on the ohm meter, was erratic just like the fan speed.
I think the resistor directly controls the voltage to the climate control fan. I removed and replaced the resistor with a new one on two separate units and the both worked perfectly.
Please see picture attached of the troublesome part.




MODERATOR NOTE:
If putting the module back is a problem due to difficulty in aligning controls, click here and read post #4:
https://www.crossfireforum.org/forum...alignment.html

 

What is the full part number for the resister?

 

if u fix them $$$ I will send u mine, jim

 

This is what is marked on the part Piher Spain 4k7428me

 

I believe these are the same . Maybe someone can confirm that. If I bought 10 of them would anyone be interested in buying the extras off me . I think it would come out to about $3 each, including shipping.

https://www.ebay.com/itm/Piher-PT15N...F/254873150145

 

Yes, I would take one or two.

 

I will take 2 also. PM me with $$$ and paypal address.

 

Looks like there's some interest, so I ordered 10.

 

Great diagnosis and part find!

 

Electrically, that is probably the part. There are two kinds: Linear taper and audio taper - we want linear taper. If it's an audio taper, the entire fan speed range will be in between two fan switch positions instead of five. Usually, a linear taper is assumed unless specified otherwise, hence I think it's the right part. Piher's product pages describe many such pots with a "PT1Nxx" series part number, all of them are described as "linear taper" - so I think it's the right part.

Physically, it may not quite fit, but I suspect you could spread/contract it's solder-legs and make it fit, provided the shaft from the control fits the hole in the center, and if not, a simply modification with a file may do the job. There are a handful of "PC mount pot" sizes but they don't vary by much.

 

This thread is worthy of pinning.
DONE.

 

Great find, this might just be the fix for the erratic fans on our cars. I believe I'll hold off on my one, thanks for understanding.




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Where did you buy a replacement from?

 

I'll take one or two if there's insufficient demand by others. I can send you PayPal.

Since I already replaced the resistor pack some years ago and still have erratic behavior, it would be interesting to see if this inexpensive variable resistor is the source of the problem.

 

Hi, received the resistors. Have 10 available at $3 each, includes shipping to US. I have not taken my climate control apart to verify fit. Paypal email is maggy_94928@yahoo.com.

 

Just sent you $3 by PayPal. If PayPal didn't provide my address, let me know and I will send it to your yahoo email.

Thanks

 

Hi Maggy Can i purchase (2) of them?. i can send you 6 dollars paypal if you say yes....thank you....Jeff

 

That would be fine

 

Just sent $3.00, Thanks Maggy!


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Does any one know if there is a tutorial for this replacing of this part, yet? Have looked but have not run across one.


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