Drivers side AC vents blow hot?

Tiny
CCRAIN
  • MEMBER
  • 2007 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 123,000 MILES
I have a LTZ Tahoe with dual air control for front seats. The drivers side will occasionally blow hot air while the control head temp is set at 68 degrees. I know that these models have had blend door issues. My question is, how do I know which door is bad and how do I get to them to check them?
Do you
have the same problem?
Yes
No
Tuesday, October 7th, 2014 AT 1:52 PM

27 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
I feel you are correct and it is the door. The blend doors are mounted on the heater box near the heater core under the dash. this guide will show you how it fix it.

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

Please run down this guide and report back.

Was this
answer
helpful?
Yes
No
+1
Wednesday, November 13th, 2019 AT 6:12 PM
Tiny
RICHARD FULTON
  • MEMBER
  • 2005 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 108,000 MILES
I have dual zone automatic hvac. When driver side is supposed to blow warm air it blows cool. I have replaced the actuator behind console 4" above transmission hump just to the left of where passengers left foot would be twice and recalibrated several times several ways but still no control for driver side temperature. While recalibrating you can see the actuator turn, but afterwards when I try to change the temperature it does not move. I can open and close damper by hand when actuator is down and air temperature changes on driver side. Dealership charged me $134.00 to tell me the left temperature actuator is not working, and said they would replace it for $661.00. At my wits end as to how to resolve this problem. Please help!
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
JIS001
  • EXPERT
The driver side air temperature control is located behind the dashboard and that is why they are charging so much because of the labor involved to pull back the dash.
Was this
answer
helpful?
Yes
No
+1
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
RICHARD FULTON
  • MEMBER
Would this also cause the rear air to be cold too regardless of temperature setting?
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
JIS001
  • EXPERT
No that would be a separate issue. Make sure both controls are switched off. The one you control up front and the rear one.

The front control will overide the rear controls.
Was this
answer
helpful?
Yes
No
+1
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
RICHARD FULTON
  • MEMBER
Will it do damage to an actuator to connect the electric and power it up before it is mounted?
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
JIS001
  • EXPERT
If you mean installing the electric connector then no. If you apply power manually yes you can damage it.
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
RICHARD FULTON
  • MEMBER
If an actuator dies on you and you get a new one but it is not in the same position, how do you get it there? I tried to install the blend door actuator and it did not line up correctly so I turned the power on to get it into the correct spot to line up. Is that called clocking it and can that do damage?
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
KEN
  • ADMIN
Hey RICHARD,

Just move the door pivot manually and install the actuator. Here is a guide that can help.

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

Please let us know what you find so it will help others.

Best, Ken
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
RICHARD FULTON
  • MEMBER
I replaced the blend door and temp door actuators, and after at least 12 tries the recalibration worked, however if I have both sides on heat and I touch any control on the driver side the driver side temp will cool a bit and then, after a few seconds it will warm back up to the correct temp. And now the rear air will not calibrate, I was trying this because the rear air will only blow cold air no matter what temperature it is set at.
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
LUKEGREEN
  • MEMBER
  • 2005 CHEVROLET TAHOE
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
The original problem was the drivers side AC vents would all of a sudden blow hot air when AV was on. We could kill engine them restart to resolve the problem for a varied period of time. Sometimes a few hours and sometimes a week.
But now our main issue is the drivers side vents do not blow any air unless you are travelling at least 55 mph them they will barely blow. Every now and then we will be driving and all of a sudden the drivers vents will work normal but that is very rare and doesn't last long. I tried pulling all fuses and letting every thing "reset" which did not work. Please advise what is needed to get drivers vents to blow again. Thanks in advance.
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
HMAC300
  • EXPERT
You are going to have to see if temp actuator for that side is getting power if it is not then it will have to be scanned for codes to see if it is control head or actuator. A local garage will have to do that. A panel must be pulled down to access it see pics.
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
KEN
  • ADMIN
Hey Richard,

It sounds like you have one of two problems, either you have a rear temperature sensor that is bad or the controller is shorting out.
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
RICHARD FULTON
  • MEMBER
I got rear calibrated by pulling ecc fuse for 10 seconds then replaced started car, let run 1 minute shut off for about 20 seconds and then restarted and it works! Thank you
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
KEN
  • ADMIN
Glad you could get it fixed please use 2CarPros. Com anytime we are here to help

Best, Ken
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
JAMAR BROOKS
  • MEMBER
  • 2005 CHEVROLET TAHOE
  • 4.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Here is my issue: in my dual climate control SUV, the driver s side is stuck on cold even when it is set to blow heat. The passenger and rear controls are fine. What could this be?
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

It sounds like the blend door motor for the heat has failed.

I attached the procedure with some pictures for you to view. The console has to be removed to access the actuator.

Roy

Temperature Valve Actuator Replacement - Left Side

Removal Procedure Notice:In order to avoid actuator damage, do not apply power to the actuator when it is not installed in the HVAC module.

1. Remove the center console, if equipped. See: Console > Removal and Replacement
2. Remove the instrument panel (I/P) insulator panel. See: Dashboard / Instrument Panel > Removal and Replacement

imageOpen In New TabZoom/Print

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

Installation Procedure

imageOpen In New TabZoom/Print

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

Notice:Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the screws to the left air temperature actuator (2).

Tighten
- Tighten the screws to 2 Nm (18 lb in).

3. Install the electrical connector (1) to the left air temperature actuator (2).
4. Install the I/P insulator panel. See: Dashboard / Instrument Panel > Removal and Replacement
5. Install the center console if equipped See: Console > Removal and Replacement
6. Reprogram the left air temperature actuator. See: Heating and Air Conditioning > P
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:02 AM (Merged)
Tiny
BUZZSTER9
  • MEMBER
  • 2005 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 2,200 MILES
2005 chevy tahoe with air cond. Running cold air on drivers side hot on pass. Side?
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:03 AM (Merged)
Tiny
FACTORYJACK
  • EXPERT
A common concern, that usually ends up being a faulty actuator. Remove the HVAC/ECAS fuse from the underhood fuse block for 10 seconds or so. Install the fuse, turn the key on without touching any controls for a minute or so. See if the function resumes to normal. There is also a reprogramming that can be done to address this concern. It is in a GM service bulletin, included below.

#06-01-38-003: Intermittent Ticking Noise from I/P, Poor A/C Performance, HVAC DTCs B0229, B0414, B0424, B3770, (Reprogram HVAC Control Module) - (Apr 27, 2006)

Subject:

Intermittent Ticking Noise from I/P, Poor A/C Performance, HVAC DTCs B0229, B0414, B0424, B3770 (Reprogram HVAC Control Module)

Models:

2004-2006 Cadillac Escalade Models

2004-2006 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2004-2006 GMC Sierra Models, Yukon Models

with Air Conditioning (RPOs CJ2, CJ3)

Condition

Some customers may comment on one or more of the following concerns:

Intermittent ticking/clicking noise from the instrument panel.

Recirculation mode does not work or Air Conditioning (A/C) system performance is poor during high ambient temperatures.

Unable to control the driver side temperature.

Unable to control the passenger side temperature.

Unable to change the front system modes.

Cause

This condition may be caused by the Heating, Ventilation and Air Conditioning (HVAC) actuators that may hunt for the correct commanded position. This cycling may cause a clicking or ticking noise.

An overtravel of the HVAC system control doors may cause one or more of the concerns listed above. If an overtravel occurs, a Diagnostic Trouble Code (DTC) will be set, and the door will go to a preset default position. When a system door defaults, that door will stay at the default position until the DTC is cleared. After the DTC is cleared, the door will operate properly until the overtravel condition re-occurs.

The following table lists the HVAC system doors and the DTC associated with it.

System Door

Overtravel DTC

Air inlet door (recirculation door)

B0229

Left temperature door

B0414

Right temperature door

B0424

Front system mode door

B3770

Correction

Technicians are to perform the normal diagnostic procedures in SI for these concerns. If diagnostics show that the HVAC system door(s) travel below 5 counts (out of the lower range) or above 250 counts (out of the upper range), then update the software calibrations in the HVAC control module. The new calibrations were made available to dealerships as part of TIS2000 incremental satellite update version 2.5, which was broadcast to dealers in February 2006.

The new calibrations have been updated to compensate for the actuator overtravel condition, the actuator hunting and the ticking/clicking noises. The new calibrations effectively eliminate the codes listed above, the default position of the doors associated with the DTCs and opens up the feedback position value. The new calibrations should not be used unless the vehicle has one or more of the customer concerns listed above or a DTC listed above has been set. The new calibrations will not correct any other DTC or A/C system performance concern.
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:03 AM (Merged)
Tiny
KENNETH BUNDY
  • MEMBER
  • 2004 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 122,000 MILES
The driver side AC will blow cold air, then for no reason it will start blowing hot air. When it blows hot air the passinger side will continue to blow cold. This happens when the controls are in auto or when it is controled by the seperate temperature selectors. I do not know if this is related but at differant times the Speedometer stops reading correctly. It happens when I am stoped, when I take off the speedometer only goes up to 30 or 40 MPH, or it might stay at zero. Everything else on the dash is working fine, tach, odometer, crusecontrol.
Was this
answer
helpful?
Yes
No
Thursday, December 3rd, 2020 AT 10:03 AM (Merged)

Please login or register to post a reply.

Sponsored links