cold on passenger side, warmer on driver side?

The vents are run by an actuator it sounds like you have one that is not working here is a guide to help you see whats going on and how to fix it.

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

Please run down this guide and report back.

My driver side AC is blowing hot air while the passenger side blows cold. I called around and believe it could be a actuator. I do have separate temperature controls for driver and passenger, but they are not digital. Any idea where to start? I am trying to see if can do this myself. When I push the AC switch on I can hear the compressor.

Good evening.

There is a blend door motor on the passenger side that controls the heat and cold command. common issue for this issue.

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

Roy

REMOVAL PROCEDURE


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1. Remove the right side instrument panel insulator.
2. Remove the instrument panel compartment.
3. Disconnect the electrical connector from the right air temperature actuator.


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4. Remove the screws which secure the right air temperature actuator.
5. Remove the electric actuator.

So I just want to make sure I understand correctly because the video shows the removal from glove box area from a different car but your reply reads " the right side instrument panel " is that the glove box?

Also, just an FYI, I had a code p0400 come up the other day when my service engine light came on. One of the items to check to fix was a vacuum hose leak. Could this cause the actuator to not open or close? I read that the vents are actuated by vacuum.

Correct. It is behind the glove box door when you remove it. It will be a clear shot to get to the actuator.

Roy

Sorry, meant to put p0440.

dual climate control. Seems like a door is stuck but don't know how to get to it and check it out. Driverside works fine Passenger side only blows cold airIs ther a way I can fix this myself.

once the failure is determined. there is a blend door motor that needs to be tested to verify that it is bad and not the control.
it is under the dash right side.
a shop with a scan tool and voltmeter can track down the failure for you.

Roy

440 is an EVAP code for the vapor recovery system, this has no effect on your AC issue.

Roy

SYSTEM DESCRIPTION
The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge valve OPEN and the EVAP vent valve CLOSED. This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, this DTC sets.


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The table illustrates the relationship between the ON and OFF states, and the OPEN or CLOSED states of the EVAP canister purge and vent valves.

CONDITIONS FOR RUNNING THE DTC
^ DTCs P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114, P1115, P1121, or P1122 are not set.
^ The ignition voltage is between 10-18 volts.
^ The barometric pressure (BARO) is more than 75 kPa.
^ The fuel level is between 15-85 percent.
^ The engine coolant temperature (ECT) is between 4-30°C (39-86°F).
^ The intake air temperature (IAT) is between 4-30°C (39-86°F).
^ The start up ECT and IAT are within 9°C (16°F).
^ The vehicle speed sensor (VSS) is less than 121 km/h (75 mph).

CONDITIONS FOR SETTING THE DTC
The EVAP system is not able to achieve or maintain vacuum during the diagnostic test.

ACTION TAKEN WHEN THE DTC SETS
^ The control module will illuminate the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostic test ran and failed.
^ The control module will store conditions which were present when the DTC set as Freeze Frame/Failure Records data.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The control module will turn the MIL OFF during the first trip in which the diagnostic has been run and passed.
^ A last test failed (current DTC) clears when the control module turns OFF the MIL.
^ The history DTC will clear after the control module runs and passes 40 consecutive warm up cycles with no failure.
^ The DTC can be cleared by using a scan tool.

DIAGNOSTIC AIDS
^ Use the J 41413 EVAP Pressure and Purge Station in order to pressurize the EVAP system to aid in locating intermittent leaks. Move all EVAP components while testing with the J 41416 Ultrasonic Leak Detector.
^ A temporary blockage in the EVAP canister purge valve, purge pipe or EVAP canister could cause an intermittent condition.
^ Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.

there is no problems with the air conditioning at all this is y I'm thinkung it is stuck.Not alot of money here so am triing to fix myself is there a way to bypass the dual climate control and just use the drivers side temp settings.

Great, thank you so much. I am heading to O'reily to get me a part and give this a whirl. I will keep you updated.

no, no real short cuts.

Roy

You are welcome.

Keep us updated.

Roy

will the blend door actuator from my 2000 Bonneville fit as it is going for scrap soon.

So here is where I am at right now. I went to buy a new replacement actuator for my car and AutoZone sold me the wrong one, return home to put the old one back on and it is taking me forever. I cannot align actuator correctly, but noticed this piece keeps coming off when I turn on AC.

you need to verify the part numbers are exact or it wont work..

Roy

It looks like the piece that attaches to the white part has the end broken off.

Roy

Hello –

For this, would you please do me a favor, please go to Auto Zone (AZ) or O’Reilly’s (OR) and for FREE they can pull the codes to the car. Most important: Once they check your codes, if they find something and you don’t get it fixed and need to get back with us, please make sure you tell us exactly what the code was, number and all. Example, if the code was E0568 O2 Sensor bad. Then make sure you give us all of that. While there for FREE also they can bring their tester out and check your battery, alternator and starter.

Some of the review of the system may indicate it may have thrown two codes but not turn on the light to indicate that. I am looking for codes DTC 80361 or B0441.

Please ensure you perform the above and get back with me.

According to rock auto they are the same unit so looks like I'll give it a try this afternoon Thanks for the help will let you know.

I was not sure you received this message earlier.


Okay great, that is what we thought. So I was going to head over to Pick-N-Pull and see if I can find that white plastic piece, but I am so having a problem putting the actuator back on to the car I am not sure how it actually went. Also, I read that I can connect the actuator back up to the plug and then adjust the dials on my air conditioner to see if it actually turns is that correct?

The heater blows hot on the pass. side and cold on drivers side

good luck
Roy

I also want to say thank you for all of your help and guidance that you have given me through this process.

Hello Ljcarp

If you sent me information from the tests I required you do….it did not come across……please resend

wow I changed it out and no power getting to it. So i cheched the plug at the climate control and had coffee spilt on it. clean it up with contact cleaner and the way it went. back in buisness cost $0. Just my time

You are welcome. We are glad to help in any way.

Roy

good for you.

Roy

Was not sure you received this message earlier.

Okay great, that is what we thought. so I was going to head over to Pick-N-Pull and see if I can find that white plastic piece, but I am so having a problem putting the actuator back on to the car I am not sure how it actually went. Also, I read that I can connect the actuator back up to the plug and then adjust the dials on my air conditioner to see if it actually turns. Is that correct?

Good evening, do I need to re-calibrate my HVAC if I only removed the blend door actuator and then reinstalled it?

No, not on vacuum actuators. The electric actuators require calibration but not the vacuum control units.

Roy

2003 Buick century, cold on passenger warm on driver. both actuators are working. I found a hole in vacuum line by the battery and spliced it back together. no help. its seems that I am getting heat from heater core. hotter when car is moving even on inside air only. when heat is on on I get more heat on passenger side. the vent door open and closes fine. there must be a door that separates the two sides? controls panel seems to be working also. Help!

We may be making an assumption on how the actuators are working because I show that these are electric temperature control actuators but the others like mode door are vacuum controlled.

Did you monitor them actually moving the door on the driver side? The fact that you get more heat when driving is another indicator that it is a blend door issue when they are weak.

What I would do is access the driver side and then operate the system in max heat, then see if the door moves. Then remove the actuator and manually move the door to max hot and max cold and see if the temp gets hotter.

This will confirm the actuator is not moving the door to its full travel:

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

Please let me know if you have questions on this and see the info below on this.

Thanks

Hello, I'm Danny.

Yes, there are a left and right side air temperature actuator on your car. Here is a basic tutorial showing how to replace a blend door actuator which is similar:

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

I've attached picture steps below on how to replace the left-driver side air temperature actuator on your vehicle. This is for an automatic HVAC system. I also included the last picture step on how to recalibrate the new actuator after the repair is made. Hope this helps and thanks for using 2CarPros.

i removed the actuator and moved the door by hand and did not make a defiance. i can see and feel the actuator move the door. when its on just vent, the air is warmer than what it is outside. on defrost i get cold on passenger side and warm on driver as i do with all the other settings. there must be a door that separates the system. tomorrow i will remove the control panel and check connections and hopefully i will be able to see what's in front of the heater core.

Hello again.

Okay, keep us updated and we'll go from there. Thanks again for using 2CarPros.

Danny-