A/C heater blower
Thread Starter
Burning Brakes
Joined: Jul 2015
Posts: 964
Likes: 124
From: Chesapeake Va
A/C heater blower
Is this normal,it blows fine when I got it 70 or below,but when I turn it on warmer it does not blow as hard.all the speeds work,it just don't blow as hard above 70.is there a acuator.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Sounds like a blend actuator issue. Pull your dash trouble codes and let's see what it says. If you don't know how let us know.
Might try this also:
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 in the I/P fuse box).
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.
Mr. Sam
Might try this also:
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 in the I/P fuse box).
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.
Mr. Sam
Last edited by dadaroo; Dec 21, 2015 at 05:44 AM.
Thread Starter
Burning Brakes
Joined: Jul 2015
Posts: 964
Likes: 124
From: Chesapeake Va
Sounds like a blend actuator issue. Pull your dash trouble codes and let's see what it says. If you don't know how let us know.
Might try this also:
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 in the I/P fuse box).
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.
Mr. Sam
Might try this also:
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 in the I/P fuse box).
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.
Mr. Sam
Thread Starter
Burning Brakes
Joined: Jul 2015
Posts: 964
Likes: 124
From: Chesapeake Va
Sounds like a blend actuator issue. Pull your dash trouble codes and let's see what it says. If you don't know how let us know.
Might try this also:
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 in the I/P fuse box).
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.
Mr. Sam
Might try this also:
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 in the I/P fuse box).
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.
Mr. Sam
No HVAC codes.
Did have some
40 bcm B0502 h,c
B0507 h,c
B2482 h,c when cleared this one comes back.
A6-scm B2605 h
BO-RFA C2100 h
The pass.side blows harder.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Sounds like the drive side actuator is stuck. It can be accessed by removing the Knee Bolster. As old as I am I would probably pull the dash pad for easy access. Very easy in the C5 which is amazing.
Might also be the dash control unit. I keep a spare just for diagnostics in cases like this.
We'll see if any one else has another idea. Bill Curlee is really good in this area. PM him with a link to here and tell him I recommended you ask his opinion.
I can provide all the DIY to replace anything you need/want to do.
Mr. Sam
Might also be the dash control unit. I keep a spare just for diagnostics in cases like this.
We'll see if any one else has another idea. Bill Curlee is really good in this area. PM him with a link to here and tell him I recommended you ask his opinion.
I can provide all the DIY to replace anything you need/want to do.
Mr. Sam
Thread Starter
Burning Brakes
Joined: Jul 2015
Posts: 964
Likes: 124
From: Chesapeake Va
Sounds like the drive side actuator is stuck. It can be accessed by removing the Knee Bolster. As old as I am I would probably pull the dash pad for easy access. Very easy in the C5 which is amazing.
Might also be the dash control unit. I keep a spare just for diagnostics in cases like this.
We'll see if any one else has another idea. Bill Curlee is really good in this area. PM him with a link to here and tell him I recommended you ask his opinion.
I can provide all the DIY to replace anything you need/want to do.
Mr. Sam
Might also be the dash control unit. I keep a spare just for diagnostics in cases like this.
We'll see if any one else has another idea. Bill Curlee is really good in this area. PM him with a link to here and tell him I recommended you ask his opinion.
I can provide all the DIY to replace anything you need/want to do.
Mr. Sam
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The only way I know that there would be a difference in air flow between HOT and COLD would be that one of the COILS would partially blocked. There are two coils. One for the heat (hot coolant) and one for the AC Cooling (Freon). When you select different temps, the air temp actuators blend doors open or cover the heat/cooling coils to make the correct temp.
In your case it would be the heater coil. I have no idea how it could have gotten clogged other than rodent infestation. Ive been down that road before:
That crap was everywhere in the system.
SO,, Pull the fan out and inspect the HVAC AIR BOX for crap. You may need to use a bore scope to see in that deep. All that stuff that you see was easily accessable and I was able to remove the remainder by hand and a vacuum hose.
Bill
In your case it would be the heater coil. I have no idea how it could have gotten clogged other than rodent infestation. Ive been down that road before:
That crap was everywhere in the system.
SO,, Pull the fan out and inspect the HVAC AIR BOX for crap. You may need to use a bore scope to see in that deep. All that stuff that you see was easily accessable and I was able to remove the remainder by hand and a vacuum hose.
Bill
Last edited by Bill Curlee; Dec 24, 2015 at 11:35 AM.
Thread Starter
Burning Brakes
Joined: Jul 2015
Posts: 964
Likes: 124
From: Chesapeake Va
The only way I know that there would be a difference in air flow between HOT and COLD would be that one of the COILS would partially blocked. There are two coils. One for the heat (hot coolant) and one for the AC Cooling (Freon). When you select different temps, the air temp actuators blend doors open or cover the heat/cooling coils to make the correct temp.
In your case it would be the heater coil. I have no idea how it could have gotten clogged other than rodent infestation. Ive been down that road before:
That crap was everywhere in the system.
SO,, Pull the fan out and inspect the HVAC AIR BOX for crap. You may need to use a bore scope to see in that deep. All that stuff that you see was easily accessable and I was able to remove the remainder by hand and a vacuum hose.
Bill
In your case it would be the heater coil. I have no idea how it could have gotten clogged other than rodent infestation. Ive been down that road before:
That crap was everywhere in the system.
SO,, Pull the fan out and inspect the HVAC AIR BOX for crap. You may need to use a bore scope to see in that deep. All that stuff that you see was easily accessable and I was able to remove the remainder by hand and a vacuum hose.
Bill
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
The blower motor has 3 screws, a hose, and the electrical connector.
It's hanging on the far right passenger side under the dash.
Two of the screws are easy, the back one is a bit of a pain.
The hose will pop right off, just make sure you remember to
reconnect it.
Some pics here and also shows the panel you need to remove. It shows as already removed but you should get the idea. Just takes a few minutes so it is a good DIY job.
https://www.corvetteforum.com/forums...ment-info.html
Good luck, Mr. Sam
It's hanging on the far right passenger side under the dash.
Two of the screws are easy, the back one is a bit of a pain.
The hose will pop right off, just make sure you remember to
reconnect it.
Some pics here and also shows the panel you need to remove. It shows as already removed but you should get the idea. Just takes a few minutes so it is a good DIY job.
https://www.corvetteforum.com/forums...ment-info.html
Good luck, Mr. Sam