1987 BMW 635 HEATER BLOW COLD AIR WHEN DRIVING ON HIGHWAY

  • Tiny
  • moejam
  • 1987 BMW 635

Heater problem
1987 BMW 635 6 cyl Two Wheel Drive Automatic 193 miles

my heater works fine when parked or driving on low speed, but blows cold air when I speed up.I have changed the engine thermostat still the same problem. Any ideas

Do you
have the same problem?
Yes
No
Sunday, December 21st, 2008 AT 5:13 PM

3 Replies

  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,717 posts

Change the heater control valve. It is located on the firewall. Just take the four Phillips head screws loose on the top and pull out the old one and in with the new one. Part # 64-11-8-390-132. Realoem. Com is a good place to go for parts and exploded views.

Was this
answer
helpful?
Yes
No
Monday, December 22nd, 2008 AT 3:42 PM
  • Tiny
  • moejam
  • Member

Thank you.

Was this
answer
helpful?
Yes
No
Monday, December 22nd, 2008 AT 3:46 PM
  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,717 posts

Merry Christmas mate ♥

Was this
answer
helpful?
Yes
No
Monday, December 22nd, 2008 AT 3:49 PM

Please login or register to post a reply.

Similar Questions