drivers or passengers side of the vents are not working for AC or heater?

there are three one for temp and one for each side. prior to replacing the actuators pull the hvac fuse inside truck with key on for 60 seconds it may reset them and get it working. it should be scanned for codes as well to see if heater control is sending power to the actuators. #4 in pic is for right side 6 is mode like defrost vent etc.

That image I was sent is upside down right cause I can feel an actuator towards the center passenger side, also if it matters the passenger side changes ftom heat to cold and back with no problem, it's just the driver side stuck blowing hot air. Thanks for your help btw, I'll work on it tomorrow.

actually no that is the way it sits in the truck. the view in this pic is the bottom an dthe actuator pointed to is for the drivers side for temp.

After a rat invaded mt truck, I lost the ability to heat the entire left hand side of my interior and get heat through all ducts on the right hand side. Which part of the system should I troubleshoot?

Hi and thanks for using 2CarPros.

If you still get air flow through the left but no heat, I have a feeling the mouse chewed the wiring to the blend air door actuator on that side. That is the first thing I would check.

Here are general directions for replacing the actuator:

https://www.2carpros.com/articles/replace-blend-door-motor

Here are the specific directions for the left side blend door actuator. Picture 1 shows location.

AIR TEMPERATURE DOOR REPLACEMENT - LEFT (DELPHI)

REMOVAL PROCEDURE

Picture 1

1. Remove the HVAC module.
2. If equipped remove the heat stakes (1) from the HVAC module (2) with a screw driver and a hammer.

Picture 2

3. If equipped remove the HVAC module assembly screws.
4. Remove the upper HVAC module case (3) from the lower HVAC module case (10).
5. Remove the air temperature separator plate (5) from the lower HVAC module case (10).
6. Remove the left temperature door (11) from the lower HVAC module case (10).

INSTALLATION PROCEDURE

Picture 2

1. Install the left temperature door (11) to the lower HVAC module case (10).
2. Install the air temperature separator plate (5) to the lower HVAC module case (10).
3. Install the upper HVAC module case (3) to the lower HVAC module case (10).

NOTE: Refer to Fastener Notice in Service Precautions.

IMPORTANT: For every heat stake removed ensure that you install a screw.

4. Install the screws to the HVAC module assembly.

Tighten
Tighten the screws to 1.6 N.m (14 lb in).

5. Install the HVAC module.8

_________________________________________________

This is the first thing I would check. Let me know if this helps or if you have other questions. If you need additional information, please let me know if this has automatic or manual temperature control and dual climate control. I am basing you problem on a mechanical dual climate system, which most are.

Take care,
Joe

If if vehicle is running and you switch from A/C to heat it will not switch back to heat on the temperature control knob; unless you turn the vehicle off switch it to cold and then start the vehicle again then it blows cold until you move it to hot.

That is an interesting one. The blend air door actuator is electric, so it shouldn't matter if the engine is already running.

Does the vehicle have duel climate control? If so, does it happen to both sides of the vehicle?

What I suggest is this. You may have a weak or bad blend air door actuator. I would remove the actuator and see if it responds when normally it wouldn't. At least that way we can determine if the actuator is working and if not, if it is getting power.

Let me know about that. Also, here is a link that shows in general how a blend air door actuator is replaced:

https://www.2carpros.com/articles/replace-blend-door-motor

Here are directions specific to your vehicle. The attached pictures correlate with the directions.

REMOVAL PROCEDURE
1. Remove the IP insulator.

2. Disconnect the electrical connector (8) from the air temperature actuator (9).
3. Remove the air temperature actuator retaining screws.
4. Remove the air temperature actuator.

INSTALLATION PROCEDURE

1. Install the air temperature actuator.
2. Install the air temperature actuator retaining screws.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the screws to 1.6 N.m (14 lb in).
3. Connect the electrical connector (8) to the air temperature actuator (9).
4. Install the IP insulator.

Check out the diagrams (Below). Please let us know what happens.

My truck's heater defrost/heater has not worked on the driver side or middle vent. found that the blend door motor behind radio is not working all others do. Why have i not been able to find videos which apply to this? Every one has only the easy ones to replace.
Thanks

Hi and thanks for using 2CarPros.

Here are the directions for removal of the instrument panel removal and replacement. Picture 1 correlates with these directions.

Instrument Panel (I/P) Assembly Replacement

Removal Procedure

Caution: Refer to Battery Disconnect Caution in Service Precautions.

Caution: Refer to Restraint System Service Precautions in Service Precautions.

1. Remove the instrument panel (I/P) trim panel.
2. Remove the center console, if equipped.
3. Disconnect the negative battery cable.
4. Remove the driver side knee bolster.
5. Remove the lower I/P trim panel.
6. Remove the passenger side airbag module.
7. Remove the radio.
8. Remove the HVAC control.
9. Remove the accessory switch housing.
10. Remove the left air louver housing.
11. Remove the steering column.
12. Remove the communication interface module (CIM), if equipped.
13. Remove the remote control door lock receiver module, if equipped.
14. Remove the data link connector from the I/P.
15. Remove the park brake release lever from the I/P.
16. Remove the instrument panel cluster (IPC).
17. Remove both front window air ducts from the I/P assembly.
18. Remove the harness from the I/P.


Picture 1
19. Remove the I/P assembly retaining bolts (3) and nuts (4).
20. Remove all harness hold down retainers from the I/P assembly.
21. Remove the I/P assembly from the vehicle.

Installation Procedure

1. Install the I/P assembly to the vehicle.
2. Install the harness hold down retainers to the I/P assembly.


Picture 1
3. Install the I/P assembly retaining bolts (3) and nuts (4).
Ensure the wire harness is routed to all of the openings.
4. Install the harness to the I/P.
5. Install both front window air duct to the I/P assembly.
6. Install the IPC assembly.
7. Install the park brake release lever to the I/P.
8. Install the data link connector to the I/P.
9. Install the remote control door lock receiver module, if equipped.
10. Install the CIM, if equipped.
11. Install the steering column.
12. Install the left air louver housing.
13. Install the accessory switch housing.
14. Install the HVAC control.
15. Install the radio.
16. Install the passenger side airbag module.
17. Install the lower trim panel.
18. Install the driver side knee bolster.
19. Connect the negative battery cable.
20. Install the center console, if equipped.
21. Install the I/P trim panel.

_________________________

Here are the directions for the left actuator replacement.

AIR TEMPERATURE ACTUATOR REPLACEMENT - LEFT

REMOVAL PROCEDURE
1. Remove the I/P insulator panel.


Picture 2
2. Disconnect the electrical connector (1) from the left air temperature actuator (2).
3. Remove the screws from the left air temperature actuator (2).
4. Remove the left air temperature actuator (2) from the HVAC module assembly (3).

INSTALLATION PROCEDURE

Picture 2
1. Install the left air temperature actuator (2) to the HVAC module assembly (3).
2. Install the screws to the left air temperature actuator (2).

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the screws to 2 N.m (18 lb ft).

3. Install the electrical connector (1) to the left air temperature actuator (2).
4. Install the I/P insulator panel.
5. Reprogram the left air temperature actuator. Refer to Re-Calibrating Actuators.

____________________________________________________________

Let me know if this helps or if you need additional information.

Take care,
Joe

Hot air from drivers side only when A/C is turned on. Sometimes it blows cold and other times it’s hot air. It has a mind if its own. Which actuator do I replace and what is the part number?

Good evening,

It is under the dash, left side. I attached a picture for you and the procedure below.

You can call a parts store for the part number.

Roy

AIR TEMPERATURE ACTUATOR REPLACEMENT - LEFT

REMOVAL PROCEDURE
1. Remove the I/P insulator panel.


imageOpen In New TabZoom/Print

2. Disconnect the electrical connector (1) from the left air temperature actuator (2).
3. Remove the screws from the left air temperature actuator (2).
4. Remove the left air temperature actuator (2) from the HVAC module assembly (3).

It is okay for awhile and then all of sudden it goes from cold to hot?

Hi,

If the change only happens on the driver's side, chances are the is an issue with what is called a blend air door actuator. There is one for the left side of the vehicle and one for the right side. It sounds like the left is failing.

Here is a link that shows in general how one is replaced:

https://www.2carpros.com/articles/replace-blend-door-motor

____________________________

Here are directions specific to this vehicle. Note that these directions are specific to a manual AC system and not automatic climate control. If you have the automatic system, let me know.

____________________________

2005 Chevy Truck Silverado 1500 2WD V6-4.3L VIN X
Air Temperature Actuator - Left
Vehicle Heating and Air Conditioning Air Door Actuator / Motor Service and Repair Procedures HVAC System - Manual Air Temperature Actuator - Left
AIR TEMPERATURE ACTUATOR - LEFT
AIR TEMPERATURE ACTUATOR REPLACEMENT - LEFT

REMOVAL PROCEDURE
1. Remove the I/P insulator panel.


pic 1

2. Disconnect the electrical connector (1) from the left air temperature actuator (2).
3. Remove the screws from the left air temperature actuator (2).
4. Remove the left air temperature actuator (2) from the HVAC module assembly (3).

INSTALLATION PROCEDURE


pic 2

1. Install the left air temperature actuator (2) to the HVAC module assembly (3).
2. Install the screws to the left air temperature actuator (2).

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the screws to 2 N.m (18 lb ft).

3. Install the electrical connector (1) to the left air temperature actuator (2).
4. Install the I/P insulator panel.
5. Reprogram the left air temperature actuator. Refer to Re-Calibrating Actuators.

____________________________________

Please note that I am basing this on the idea that the AC continues to work on the passenger side. What I would suggest is to remove the actuator and see if it responds when the temperature is changed. Also, make sure nothing is loose or damaged causing it to move.

Let me know if this helps or if you have other questions.

Take care,
Joe

My truck has dual the cooling controls and the passenger side air blend door actuator has probably failed. Where is it located?

Hello,

We have an excellent guide for this.

https://www.2carpros.com/articles/replace-blend-door-motor

Please let us know what happens.

Cheers, Ken

Thanks! I have seen that already. I neglected to specify in my question what I was actually looking for.

I understand there are two on my truck. One located 'below' (as your guide shows) and one on top which necessitates the dash removal. Can you tell me which one is for the passenger's side? I would really not prefer to spend the time messing with the bottom one if I am actually going to have to dis-assemble so much to get to the 'top' one.

Tia

The passengers side is the bottom one.

Please let us know what happens.

Cheers, Ken

I went to replace it this afternoon and discovered I will still need to get a lot of stuff out of the way to access it well, but I plugged the new one in to make sure it would operate properly. As soon as I plugged it in, it rotated all the way to the opposite side. I started the truck and tried to get to 'actuate' with all of the HVAC functions and it did not move, let alone the passenger side heat/cool control. My background as a locomotive troubleshooter makes me think that the problem may actually be with the control assembly itself and not the actuator itself. Is there anything else involved in making those actuators 'actuate'?

do not forget to pull HVAC fuse inside truck once it is replaced so it will reset.

the fuse for HVAC inside the truck resets the actuators and must be done after an install.

Turned out it was the top one...

Nice work, we are here to help. please use 2CarPros anytime.

Cheers, Ken

Hello, was having same issue on driver side. 04 silverado, 5.3l V8, Crew Cab, 4WD. I have dual climate control with digital display. I can confirm that the actuator located above passenger side floor board, near front of center console, does serve the driver side vents. My issue was intermittent, sometimes would work fine, but most the times it would start acting up 5 or 10 minutes down the road. Would blow cold air out of both sides, then all the sudden would start blowing hot air out the driver side. Turning truck off and back on would usually fix it, but again for only 5 or ten minutes. I was able to repair my actuator.
Found actuator and removed. Then opened it up to expose the guts. Small motor, 4 gears, and circuit board. I removed the black gear by lifting straight up, noticed attached tonthe gear were 2 metal tabs which touched the circuit board. This is what provides position feedback to hvac system to let it know the position of the damper actuator. Noticed on the circuit board where the 2 metal rabs ride, there was a bunch of grease built up on the track. Grease is what lubricates the plastic gears. Proceeded to clean the grease off. Reassembled and reinstalled actuator. Voila. So far so good.

Yep the grease in the wrong spot will do it. Excellent addition to this thread! Please feel free to help out whenever you are on the site :)

Passenger side putting out hot air? One side is working?

There are two blend air doors on this system. One is not working. Check that first. This guide will help you see whats going on.

https://www.2carpros.com/articles/replace-blend-door-motor

Please run down this guide and report back. They are near the heater core. Just adjust the temperature settings and see if they are moving

Okay, I found two the bottom one is working the top one is not. the one you cannot get to of course that requires the whole dash to be removed (right).

Well, not the entire dash, but you will need to move things around to access it.

My finger is pointing to it in one picture I replaced.

For several years cool one side not the other. Then reverse happens. Then works fine for weeks. Now no heat from any side of defroster. Just blows cold air.
Any ideas?
Thanks

Clearly we are having a blend door actuator issue but we need to find out if it is a control issue or the actual actuators. Do you have an automatic system or manual? Also, do you have a dual climate system? Meaning can you adjust each side individually or not?

I am attaching the process below for the manual system blend door actuator as I am assuming that is what you are having no air on either side now but the different temps from each side makes me think you have dual zone.

Let's start with this info and go from there. Thanks

https://www.2carpros.com/articles/replace-blend-door-motor

I believe I have an auto system. I can pick a temperature and it will adjust and maintain
the selected temperature. I do have a dual climate system. At the moment I have no heat from either side, nor from the defrost position, no matter what the selected temperature is. Blower works fine, I just replaced the blower module with in the last month.
Thanks for your help.

Okay. This does sound like a blend door so I would do one thing first. Turn the heat on high and let the engine get hot. Then touch both heater core lines going into the firewall from the engine compartment and make sure they are hot. If they are hot then the blend door would be the issue.

Thank you I will give it a try.

Sounds great. Keep us updated with how this turns out. Thanks

Well, yesterday morning truck overheated. Changed the thermostat, solved that part. Did as directed. With truck hot, heater on high, only one hose hot, other cool. Slight amount of warm air blowing. Wonder if the radiator needs to be boiled out. Seems that there is a slight leak at the fitting through firewall on the hot side. What do you think of this idea?

Unfortunately that means the heater core is plugged, restricted, or leaking inside the vehicle. I suspect it is restricted which is why only one hose is hot.

Unfortunately you cannot flush these as they are called multi passage which means the coolant can flow through the passage that has the least resistance and you will not flush it out.

I attached the process to replace it as that is the only real repair.

Let us know what questions you have. Thanks

Driverside vents will blow hot air while passenger vents blow cool air while using the air conditionre. Problem is corrected by shutting off the engine and restarting. But problem reoccurs. Could this be a blend door accuator issue and if so which one? Thanks

it can be the temperature actuator for left side. try pulling hvac fuse inside truck for sixty seconds with key on it may reset if it is the actuator then see if it is getting power. but reading some tips on this just replace the actuator. see picture it is on passenger side bottom side of heater.

Thanks! I will try this.