Hvac Problem
Thread Starter
Racer
Joined: Mar 2007
Posts: 337
Likes: 0
From: yorktown virginia
Hvac Problem
OK so i replaced the dual zone climate conrtol unit (it was dim) and i was hoping my problem was an interface issue, but it wasnt. problem being, my heat and AC dont work. as in, the blower motors never kick on. I can hear the servos moving when i switch the "mode" from the top to the bottom vents, but when I hit "auto" the a/c button light flashes a few times and goes back off. i dotn think its a sensor problem because it accurately displays the outside temp and inside temps and when i get in the car on a warm day, the a/c tries to engage as displayed on the hvac controller but nothing happens. when i switch to full hot, the blower motors still dont come on and i get no heat (makes defrost very difficult hah). Im not throwing any codes in the BCM OR in the HVAC. or any codes for that matter.. any ideas on whats going on?? the warm weather is back and I NEED MY A/C!!!!
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
If the fan works, check your A/C fuse. How old is your car ?
You may need to recharge your air system.
Did you check DTC for codes ?
Thread Starter
Racer
Joined: Mar 2007
Posts: 337
Likes: 0
From: yorktown virginia
no fans come on no matter what the temp setting is. i hear the servos move and actuators and i also think i can hear the clutch engage on the A/C compressor.. what gives!?! no blowers come on.
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
Turn the heat up to high and see if blower comes on, if that does not work, check fuses.
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
Turn the heat up to the highest setting and see if blower comes on.
Try different blower settings (ie speed level andsee if it works) could be a lot of different things.
What year is your car ?
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Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
Try a PM to "Bill Curlee" he's had a lot of experience with the electrical systems and might be able to help you.
Thread Starter
Racer
Joined: Mar 2007
Posts: 337
Likes: 0
From: yorktown virginia
I also noticed last night that if i have the heat full on hot and the button selected for "fresh air" to come in instead of recirculate, and the fan set on its LOWEST setting, I can feel HOT air coming in through the vents, but the car has to be moving 45 mph or more, so i think its just air pushing its way in, and its not alot at all, you have to have your hand up against the vent to feel anything.