HVAC Question 99 vert
Thread Starter
Racer
Joined: Oct 2010
Posts: 450
Likes: 18
From: NORTHPORT NY
HVAC Question 99 vert
I have a lower than expected air flow (volume) coming from my AC vents. I can switch from ac to heat and defroster no problem, can I assume that there is enough vacuum from the manifold feed tube?
The ac is cold but it doesn't blow a lot of air......I had the dreaded battery leak and I used baking soda and water to flush the acid from the top do I need to clean any further. Thanks for any help....
The ac is cold but it doesn't blow a lot of air......I had the dreaded battery leak and I used baking soda and water to flush the acid from the top do I need to clean any further. Thanks for any help....
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
No the PCM is not your issue. Also does not seem to be a vacuum issue from what you have told us.
Can you get the blower to change speeds?
Also, pull your dash DIC codes and see if anything is there.
Not at home but have some ideas based on what you say when you respond.
Mr. Sam
Can you get the blower to change speeds?
Also, pull your dash DIC codes and see if anything is there.
Not at home but have some ideas based on what you say when you respond.
Mr. Sam
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Try this:
Re-Calibrating Actuators
Use the following steps to perform the calibration update:
1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module (fuse #27).
Important
The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.
3. Wait 60 seconds.
4. Install the fuse.
The actuators should move and reset themselves. Let them do their thing until they stop. Later if you adjust any temperature settings do it slowly or it can affect actuator settings.
Re-Calibrating Actuators
Use the following steps to perform the calibration update:
1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module (fuse #27).
Important
The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.
3. Wait 60 seconds.
4. Install the fuse.
The actuators should move and reset themselves. Let them do their thing until they stop. Later if you adjust any temperature settings do it slowly or it can affect actuator settings.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 481
From: OK
Try this:
Re-Calibrating Actuators
Use the following steps to perform the calibration update:
1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module (fuse #27).
Important
The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.
3. Wait 60 seconds.
4. Install the fuse.
The actuators should move and reset themselves. Let them do their thing until they stop. Later if you adjust any temperature settings do it slowly or it can affect actuator settings.
Re-Calibrating Actuators
Use the following steps to perform the calibration update:
1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module (fuse #27).
Important
The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.
3. Wait 60 seconds.
4. Install the fuse.
The actuators should move and reset themselves. Let them do their thing until they stop. Later if you adjust any temperature settings do it slowly or it can affect actuator settings.
Last edited by 73Corvette; May 17, 2015 at 08:57 AM.
