« previous next »
Pages: [1]   Go Down

Author Topic: Heat/air only works on full blast?? not on settings 1-3, only on 4  (Read 2654 times)

AlpineRob

  • Full Member
  • ***
  • Thank You
  • -Receive: 0
  • Posts: 115
    • View Profile
Heat/air only works on full blast?? not on settings 1-3, only on 4
« on: October 26, 2009, 08:48:08 PM »
My heat (ac doesnt work anyway) only works when i turn it all the way up to "4" What is the problem>? Thanks!
Logged

monty23psk

  • Legendary
  • ******
  • Thank You
  • -Receive: 17
  • Posts: 1291
    • View Profile
Heat/air only works on full blast?? not on settings 1-3, only on 4
« Reply #1 on: October 26, 2009, 09:04:50 PM »
Either your knob is bad or the motor of the blower, normally it is the motor. Your resitor on the motor is probably shot so only works in the on or off which is the same as #4. You can sometimes replace the resistor.
Logged
Alex  88 m5 | 91 318is | 19 Subaru Ascent
BMW Tool Rentals & Fender Roller

DesktopDave

  • Administrator
  • Legendary
  • *****
  • Thank You
  • -Receive: 60
  • Posts: 5076
  • Lives in the 80s
    • View Profile
    • The Iconic BMW
Heat/air only works on full blast?? not on settings 1-3, only on 4
« Reply #2 on: October 27, 2009, 09:52:44 AM »
Yep - fan resistor.  Pull the firewall cover off & replace the resistor card on the fan housing.
Logged
'08 Karmesinrot 128i 6MT
'86 Zinnoberrot 635CSi (M30B32/G265/3.46 torsen LSD)

Sold: '97 Montrealblau 318iS, '91 Brilliantrot 318i, '91 Brilliantrot 318iS
Pages: [1]   Go Up
« previous next »