2004 Pontiac Grand Prix A/C

NOT A CAR EXPERT

MEMBER
2004 PONTIAC GRAND PRIX
AUTOMATIC
150,000 MILES

My freon has good pressure on both high and low side. Fuses are good. Clutch is engaging I can hear the ac kick on and my rpm drop a little. But the air coming out is as hot as it is on full high heat. Could my temp knob not be working some how maybe?

4 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

It sounds like the blend air door is stuck in the heat position. Have you checked it?

Was this

answer

helpful?

Yes

No

Thursday, June 5th, 2014 AT 12:04 PM

NOT A CAR EXPERT

MEMBER
17 POSTS

How would I check it. Where would it be at

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Thursday, June 5th, 2014 AT 4:32 PM

NOT A CAR EXPERT

MEMBER
17 POSTS

Is there any test you can come up with. I've pulled the hvac fuse and let it reset with no luck. Just tried to clamp both heater core hoses. Still is hot. Maybe I didn't get a good enough clamp. My consol for ac has other buttons like defrost and seat warmer. And the buttons on them are messed up and hard to turn things on and some buttons don't work at all like defrost so I was thinking maybe the temp knob is broke?

Was this

answer

helpful?

Yes

No

Thursday, June 5th, 2014 AT 6:30 PM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

The blend air door is located near the heater core (under the dash). The door is to open one way to allow heat to enter the vehicle and the other way for AC. You need to see if it functions.

Was this

answer

helpful?

Yes

No

Thursday, June 5th, 2014 AT 6:31 PM