A/C is stuck in defrost

2002 NISSAN SENTRA
130,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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ANOTHERPRO
  • MEMBER
  • 1 POST
My defrost is blowing cold but my air conditioner doesn't blow at all. I want to begin troubleshooting but I’d like to know if this vehicle’s AC is electric or vacuum controlled.
Jul 10, 2019 at 8:03 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
Welcome to 2CarPros.

It sounds like the mode door actuator has failed. This vehicle is has a cable that controls air flow direction. I attached a picture of it. Also, often times the cable will slip in its mount and simply need adjusted.

Here are the directions for adjustment. The attached picture also correlates with the directions.

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Mode Door Control Linkage
- Turn mode door control knob to position.
- Set side link in DEF mode.
- Pull on outer cable in direction of arrow and then clamp it.
- After positioning mode door control cable, check that it operates properly.

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Let me know if this helps or if you have other questions.

Take care,
Joe
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Jul 10, 2019 at 10:33 PM
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