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Discussion Starter #1
For the last week or two the drivers side fan button has gotten harder to press and sometimes sticks. Has anyone had this problem? All of the other buttons seem fine, including the passenger side fan button.

2014 535xi
 

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I have not had any problem with that specific switch/button-- but I have used QD Electronic Cleaner (from CRC) quite successfully to free up "sticky" switches and buttons. It will clean the mechanical parts as well as the electrical contacts. Will not harm plastic. I've sprayed directly on and into power window switches.

If you use a cleaner like this, be careful you do not get an aggressive contact cleaner which can damage plastic, paint, etc. This CRC product is pretty safe for nearly all switches: https://www.autocarevideo.com/video/05103-crc-qd-electronic-cleaner-product-video/

This cleaner may not help, but it will not hurt and may very well fix the problem.
 

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02/2012 X5 35d M57Y CPO 99K miles NOKIAN WR G3 12K miles
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-- but I have used QD Electronic Cleaner (from CRC)
Wow. This is easily the most highly specified ‘exotic’ stuff that I’ve read...

Chemical name
2-methylpentane
1,1-difluoroethane
naphtha (petroleum), hydrotreated light
n-hexane 2,2,4-trimethylpentane isopropyl alcohol n-pentane 2,2-dimethylbutane 2,3-dimethylbutane 3-methylpentane
Common name and synonyms
HFC-152a
CAS number
107-83-5 75-37-6 64742-49-0
110-54-3 540-84-1 67-63-0 109-66-0 75-83-2 79-29-8 96-14-0
%
30 - 40 20 - 30 20 - 30
5 - 10 3 - 5 1 - 3 1 - 3 < 1 < 1 < 1
Specific chemical identity and/or percentage of composition has been withheld as a trade secret.
 

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Discussion Starter #4
It only seems to happen when it's VERY cold outside. When I try to lower the fan speed it turns all the way off, and vice versa because it sticks. This morning it wasn't that cold out and it seemed fine. I have to go in for yearly service in a few weeks so I'll ask them about it.
 

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Discussion Starter #5
I popped the button off and cleaned it (had some "dirt" on it). I thought that fixed the problem but it still sticks, only when it's cold outside. Is there something I should do to the part that inside once I take the button off?
 

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Discussion Starter #6
I bought some WD 40 Electronics Contact Cleaner. I'm going to pop the button off and try that to see if it helps.
 
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