The A/C and heat works but only through the defrost?

2006 PONTIAC G6
186,000 MILES • 4 CYL • AUTOMATIC
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H3LPPL3A53
  • MEMBER
  • 1 POST
One day I turned my defrost on and now I can't get air to blow from my vents. I can turn the knob, but it does not change the direction the vents blew.
Jul 26, 2023 at 12:20 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Hi,

It sounds like you have a faulty mode door actuator. The mode door is what is responsible for airflow direction.

If you look at the attachments below, I included the directions to replace the actuator. Use the directions to remove it first. Once it is removed, see if it responds when you request it to change airflow direction.

Let me know if this helps.

Take care,

Joe

See pics below.
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Jul 26, 2023 at 3:37 PM
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