Just wanted to share this easier fix than the sticky I found while trying to solve the erratic fan speed switch but not wanting to disassemble the dashboard and desolder components.

This should work for you if your fan works in all speeds, but wiggling the switch causes it to go to different speeds than what you have it set to. If your fan only works on high speed and wiggling the **** doesn't help, it's more likely a bad resister.

You will need:
1) shop towels
2) a spray can of tuner cleaner (I used Deoxit D5, , but others would likely work)

Step 1:
Carefully pry off the fan speed **** from the front of the unit, I used a small trim tool to slip underneath to the spindle in the middle and gently pried it off





Step 2:
Deoxit can take finish off plastic, so you want to be very careful not to spray it everywhere, I held a shop towel directly underneath where I was spraying to catch the excess. First I sprayed some Deoxit into the hole in the middle of the shaft of the potentiometer




Step 3:
Next I used the straw to spray the deoxit into the small holes around the perimeter of the potentiometer




I repeated this two or three times to make sure everything got thoroughly lubricated. After this I wiped up the excess, put the **** back on, and turned the fan control from off to full speed about 20 times. Now the fan control works perfectly on all speeds, no parts required.

Hope this helps somebody.

 

Thank you, that's a great tip!

 

Many years ago, I had an 8 track player that the volume control would crackle, and pop and the sound would go up and down on its own. At that time the best fix I had was wd40 and worked very well. Thanks for the tip, I will try that.

 

I am surprised you get enough in there to make any difference, you have only that seam between the white circle and black housing to get fluid in there, (with a similar seam on the back side if you get it to flow around the pot itself). [Yellow arrow]





The front panel, shown for perspective, pot is at the red arrow this time:

 

I sprayed quite a bit (little bit at a time), but in my case it definitely 100% fixed it and is still working great days later.