I hope mine doesn't start giving me this problem; I've been trying to fix the similar "only have some fan speeds at some times" problem on my wife's '98 GMC, for several years now. 3x resistors (FSU), 2x blower motors, and 2x heater/AC control panels in 3-4 years hasn't fixed it (parts cannon doesn't work, I guess).

I have to either

• 1) whack the control panel with my fist,
• 2) rapidly switch speeds several times with the knob,
• 3) turn the A/C off for awhile and restart it,or
• 4) give up until it starts behaving of its' own accord.

So far, my X5's A/C is like new, comparatively.

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01 BMW X5 E53,3.0i-5L40E, 7/13/01
topas-blau,Leder-grau,"resto-project car"

Here:
14 Lexus ES350,3.5L-U660E
09 HHR Panel,2.2L-4T45E
04 Chevy 2500HD,6.0L-4L80E
98 GMC Sierra 1500,5.7L-4L60E

Gone:
66 Chevelle Malibu 2dr ht.,327>441c.i.-TH350>PGlide/transbrake
08 Cobalt Coupe,2.2L-4T45E
69 & 75 C10s,350c.i.-TH350
86 S10,2.8L-700R4
73 Volvo 142,2.0L-MT4
72 & 73 VW SuperBeetles,1.6l-MT4
64 VW,1.2l-MT4
67 Dodge Monaco 500 2dr ht.,383c.i.-A727
56 Chevy 210 4dr,265c.i.-PGlide