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Controlling heat/AC temperature

Tiny
BAKEWALK
  • MEMBER
  • 2002 SATURN L200
  • 2.2L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
I have automatic climate control. Dial a temperature anywhere between sixty and ninety degrees. Whether on auto or manual, I only get two temperatures, full hot or full cold. Same for A/C. Other than controlling temperatures, heat and A/C work fine. I replaced the dash unit, same. It is as if the blend door is fully open or fully closed, nothing in between. Suggestions?

Thanks,
Bill
Age 68
Ohio
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Wednesday, January 10th, 2018 AT 12:27 PM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,961 POSTS
Hello,

It sounds like you have a bad ground or a broken wire or an actuator could be shorted as well.

Here is a guide to help you check the system wiring and grounds:

https://www.2carpros.com/articles/how-to-check-wiring

Below are the air conditioner wiring diagrams. Check out the diagrams.

Please run this test and get back to us.

Cheers, Ken
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Thursday, January 11th, 2018 AT 2:23 PM
Tiny
BAKEWALK
  • MEMBER
  • 3 POSTS
Thanks for the quick reply!
When you actuator, is this what opens and closes the blend door as needed? (I know it as blend door motor)
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Saturday, January 13th, 2018 AT 11:02 AM
Tiny
BAKEWALK
  • MEMBER
  • 3 POSTS
I meant "say" actuator.
Bill
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Saturday, January 13th, 2018 AT 11:03 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,961 POSTS
Yep one and the same :)
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Saturday, January 13th, 2018 AT 8:01 PM

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