Problem with cold/hot air blow

TKURYLO

MEMBER
2000 LINCOLN LS
3.9L
V8
2WD
AUTOMATIC
180,000 MILES

Hi!
Hot air blow only from driver side. But when I select "max" temperature, hot air blow on both sides (when I select "min" temperature, cold air on both sides). Sometimes, hot air blow from passenger side, and cold air blow from driver side (very rarely). Air blows separately on each side and do not mix. Diagnostic self-test of DATC - display no errors.
AC all good - blow cold on both sides when I set 16°С with any temperature of engine. And heater blow hot when I set 32°C. But, on any intermediate (from 17°C to 31°C) one side blow hot, other side - cold.
In winter, when outside cold, AC always off, but air blow again: one side very hot, other side - cold. Except 32°C and 16°C, when both side hot or cold resp.
Can you help me? Thanks.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
48,296 POSTS

Hello,

You have a blend door actuator that sounds like is going out. Here is a guide that will show you what you are in for when doing the job:

https://www.2carpros.com/articles/replace-blend-door-motor

Here is the location for your car.

Check out the diagrams (below) Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken

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