hvac left actuator
Thread Starter
Heel & Toe
Joined: Nov 2015
Posts: 18
Likes: 0
hvac left actuator
I'm getting both history and current codes
B0363 H C left actuator feedback open
B0441 H C left actuator out of range
after doing some searching, apparently the left actuator needs to be either disassembled and re-indexed or replaced? is this something I can tackle? I have the shop manuals and the normal set of backyard mechanic tools but no Corvette specialty tools (yet).
<edit> my car is a 2004 apparently that makes a difference
B0363 H C left actuator feedback open
B0441 H C left actuator out of range
after doing some searching, apparently the left actuator needs to be either disassembled and re-indexed or replaced? is this something I can tackle? I have the shop manuals and the normal set of backyard mechanic tools but no Corvette specialty tools (yet).
<edit> my car is a 2004 apparently that makes a difference
Last edited by Tom Reese; Nov 10, 2015 at 08:26 AM.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
The is a way to try and re-index the actuators. Not at home now. I can post that info later along with diagnostics for those codes. I have been told you can access the driver one with just removing the knee bolster. I would probably remove the dash to replace if it was needed since I'm not as limber as I once was.
2004 is not unique in this area.
Mr. Sam
2004 is not unique in this area.
Mr. Sam
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Try this and see if it helps:
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.
Here are the code diagnostics:
https://www.dropbox.com/sh/lgnqz8h3e...ziteav4fa?dl=0
Mr. Sam
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.
Here are the code diagnostics:
https://www.dropbox.com/sh/lgnqz8h3e...ziteav4fa?dl=0
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
Get a good flashlight and a mirror and when you cycle the actuator, see if it runs the FULL RANGE during the calibration sequence.
Inside the actuator:
If it doesn't cycle properly, maybe yours is cracked like this one.
Here is what you will see on the actuator when you watch it cycle:
If you pull the dash pad off, here's where there at:
Inside the actuator:
If it doesn't cycle properly, maybe yours is cracked like this one.
Here is what you will see on the actuator when you watch it cycle:
If you pull the dash pad off, here's where there at:
Thread Starter
Heel & Toe
Joined: Nov 2015
Posts: 18
Likes: 0
thanks for the replies! I pulled the fuse, waited the required time plus a little bit and replaced the fuse. I deleted the codes and they came back immediately. I'll order the part and change it out when I get it.
thanks again!
thanks again!
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Do you have the DIY to remove the Knee Bolster to access the area? If not let me know and I can post that and how to remove the dash pad if you want it. Removing the pad is not a hard thing to do. Not at home now.
Mr. Sam
Mr. Sam
Thread Starter
Heel & Toe
Joined: Nov 2015
Posts: 18
Likes: 0
I think I have enough info to do the R&R. the shop manual has the step by step instructions to do remove and replace. The procedure in the manual doesn't require removal of the dash pad.
I'm working on triple checking to make sure I get the correct part. Apparently the actuators were changed in 2002. Nothing is ever easy. I can't find a 2004 parts manual and the vague part descriptions make me a little uneasy about ordering something that might not fit. Prices range from $48 to $123 for the Dorman 604-106. A bit of a head scratcher there.
I might remove the unit and take it with me to the auto parts store. I'll pay more but I can compare the old one to the new unit. I can also make sure I get the correct Dorman unit and not a cheap knock off.
I will try to do the repair without removing the dash pad. If it turns out that I do need to remove it then I'll wait until I have all the parts in hand to install my new head unit and do everything at once.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Burning Brakes
Joined: Jan 2011
Posts: 1,067
Likes: 46
From: Springfield IL.
Oldtimer
I think I have enough info to do the R&R. the shop manual has the step by step instructions to do remove and replace. The procedure in the manual doesn't require removal of the dash pad.
I'm working on triple checking to make sure I get the correct part. Apparently the actuators were changed in 2002. Nothing is ever easy. I can't find a 2004 parts manual and the vague part descriptions make me a little uneasy about ordering something that might not fit. Prices range from $48 to $123 for the Dorman 604-106. A bit of a head scratcher there.
I might remove the unit and take it with me to the auto parts store. I'll pay more but I can compare the old one to the new unit. I can also make sure I get the correct Dorman unit and not a cheap knock off.
I will try to do the repair without removing the dash pad. If it turns out that I do need to remove it then I'll wait until I have all the parts in hand to install my new head unit and do everything at once.
I'm working on triple checking to make sure I get the correct part. Apparently the actuators were changed in 2002. Nothing is ever easy. I can't find a 2004 parts manual and the vague part descriptions make me a little uneasy about ordering something that might not fit. Prices range from $48 to $123 for the Dorman 604-106. A bit of a head scratcher there.
I might remove the unit and take it with me to the auto parts store. I'll pay more but I can compare the old one to the new unit. I can also make sure I get the correct Dorman unit and not a cheap knock off.
I will try to do the repair without removing the dash pad. If it turns out that I do need to remove it then I'll wait until I have all the parts in hand to install my new head unit and do everything at once.
http://www.ebay.com/itm/Dorman-604-1...=mtr#vi-ilComp
I just checked O'Reillys and their price has gone up some since i did mine. You can buy 3 on ebay compared to what the parts stores want for one.
Melting Slicks
Joined: Oct 2002
Posts: 2,515
Likes: 441
From: Arizona
Other than a different part is the replacement the same for a 2001? I literally have to do the exact same repair. Would you mind posting step by step of how you replaced the part? I too am thinking about tackling this myself.
I think I have enough info to do the R&R. the shop manual has the step by step instructions to do remove and replace. The procedure in the manual doesn't require removal of the dash pad.
I'm working on triple checking to make sure I get the correct part. Apparently the actuators were changed in 2002. Nothing is ever easy. I can't find a 2004 parts manual and the vague part descriptions make me a little uneasy about ordering something that might not fit. Prices range from $48 to $123 for the Dorman 604-106. A bit of a head scratcher there.
I might remove the unit and take it with me to the auto parts store. I'll pay more but I can compare the old one to the new unit. I can also make sure I get the correct Dorman unit and not a cheap knock off.
I will try to do the repair without removing the dash pad. If it turns out that I do need to remove it then I'll wait until I have all the parts in hand to install my new head unit and do everything at once.
I'm working on triple checking to make sure I get the correct part. Apparently the actuators were changed in 2002. Nothing is ever easy. I can't find a 2004 parts manual and the vague part descriptions make me a little uneasy about ordering something that might not fit. Prices range from $48 to $123 for the Dorman 604-106. A bit of a head scratcher there.
I might remove the unit and take it with me to the auto parts store. I'll pay more but I can compare the old one to the new unit. I can also make sure I get the correct Dorman unit and not a cheap knock off.
I will try to do the repair without removing the dash pad. If it turns out that I do need to remove it then I'll wait until I have all the parts in hand to install my new head unit and do everything at once.
Thread Starter
Heel & Toe
Joined: Nov 2015
Posts: 18
Likes: 0
If you have the duel zone system the correct part number is 604-106. Even if the other part looks correct it won't function right, the feed back has to be compatible. Here is a link
http://www.ebay.com/itm/Dorman-604-1...=mtr#vi-ilComp
I just checked O'Reillys and their price has gone up some since i did mine. You can buy 3 on ebay compared to what the parts stores want for one.
http://www.ebay.com/itm/Dorman-604-1...=mtr#vi-ilComp
I just checked O'Reillys and their price has gone up some since i did mine. You can buy 3 on ebay compared to what the parts stores want for one.
that's the part number I ordered so I got the right one. I hope it's an actual Dorman and not a clone.
Melting Slicks
Joined: Oct 2002
Posts: 2,515
Likes: 441
From: Arizona
Would you please post the diy to remove the left actuator without taking out the dash. I need to do the same repair. Thanks.
Thread Starter
Heel & Toe
Joined: Nov 2015
Posts: 18
Likes: 0
here are the shop manual instructions on how to do it for a 2004. I can't figure out how to rotate the pics to portrait mode.
Burning Brakes
Joined: Jan 2011
Posts: 1,067
Likes: 46
From: Springfield IL.
Oldtimer
I am not limber enough to replace it without removing the dash pad. So I removed the dash pad, and cleaned everything up while I had it out. Mine had some dirty places that's hard to clean with it in. Removing the dash pad isn't too bad of a job, but it does take some time.
Burning Brakes
Joined: Jan 2011
Posts: 1,067
Likes: 46
From: Springfield IL.
Oldtimer
The part should be the same if you have duel zone controls. The part is different if you have the manual system. That's the same part number I used in my 99. I know a couple guys on the forum tried different part numbers and they didn't work. If it is a factory GM part the number is different too.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Here is how to remove the Knee Bolster. You can do a shortcut by just releasing enough around the bolster to remove it but just be careful to not break and plastic pieces.
If you have a manual shifter you don't need to remove the shift ****. Just release the boot from the console and rotate it so the console lifts over it and the boot and **** can stay in place.
http://www.vetteessentials.com/instr...zel_howto.html
Let us know if anybody needs anything else.
Mr. Sam
If you have a manual shifter you don't need to remove the shift ****. Just release the boot from the console and rotate it so the console lifts over it and the boot and **** can stay in place.
http://www.vetteessentials.com/instr...zel_howto.html
Let us know if anybody needs anything else.
Mr. Sam
Thread Starter
Heel & Toe
Joined: Nov 2015
Posts: 18
Likes: 0
to follow up:
I was able to remove the old actuator and replace it with a new one by following the directions in the manual and not removing the dash pad. Technically it was easy but it was hard to do physically. I needed to use my magnetic retriever to fish out a couple of dropped screws.
I was surprised to find that the gear in the old actuator wasn't cracked. I didn't spend a lot of time looking at it but there was very stiff resistance to turning the big gear. It was hanging up on something.
Job is done and no more codes.
I was able to remove the old actuator and replace it with a new one by following the directions in the manual and not removing the dash pad. Technically it was easy but it was hard to do physically. I needed to use my magnetic retriever to fish out a couple of dropped screws.
I was surprised to find that the gear in the old actuator wasn't cracked. I didn't spend a lot of time looking at it but there was very stiff resistance to turning the big gear. It was hanging up on something.
Job is done and no more codes.