AC Help!
Thread Starter
Instructor
Joined: Apr 2007
Posts: 160
Likes: 0
From: N Canton Ohio
AC Help!
91 coupe, climate control: Added freon last year, AC worked great. This year first time i turned it on .......fans kick on, AC tube under hood very cold and frosts up. VERY hot air in cabin! No flashing LEDS. Engine wants to "Miss" at idle. I disconnected the neg bat for 30 secs, pulled the cursty and radio fuse, no help. Suspect a switch or sensor.
Thread Starter
Instructor
Joined: Apr 2007
Posts: 160
Likes: 0
From: N Canton Ohio
I'm sorry to say, really don't know. It sounds like there is surging going on. The cabin air is unuserely HOT. I don't hear any cycling sound.
Last edited by Hondo48; May 30, 2011 at 08:15 PM.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 207
From: Orlando FL
If it is cycling more off than on or 10 times a minute, that might indicate low Freon. The low side frosting up might be bad sign. It should be ice cold and sweating.
On the other hand if the Freon is good, the blend door may not operating properly. It may be sending heat into the car rather than the A/C air. I would pull the blower motor power module from the top of the evaporator box and look in there with a flashlight. Have someone run the temp control from full cold to full hot (key on) and see if the blend door is moving.
On the other hand if the Freon is good, the blend door may not operating properly. It may be sending heat into the car rather than the A/C air. I would pull the blower motor power module from the top of the evaporator box and look in there with a flashlight. Have someone run the temp control from full cold to full hot (key on) and see if the blend door is moving.
Last edited by pcolt94; May 31, 2011 at 10:20 AM.
