Drivers side cold, passenger hot for heat

Hi,

Do me a favor. If it fails again, check to see if there is power to the actuator you replaced. Also, are you sure you got the right actuator motor? I attached a pic below and highlighted the one in question.

I know that these actuators are self calibrating. Maybe that is what required the extra time. Let me know if it is still giving you trouble.

Let me know.
Joe

Hi,

If you hear a clicking, most always, it is one of the teeth broke off the actuator motor and skips.

I attached a pic below. Here is a list which is a legend identifying the components related to the HVAC. Take a look at it to see if there is anything close to where you heard the noise. Please keep in mind, a sensor won't make a clicking. It has to be a motor.

Here is the list:

1 - B7J Air Temperature Sensor - Duct Right Upper
2 - B39 A/C Evaporator Temperature Sensor
3 - M4 Air Inlet Actuator
4 - M46 Air Recirculation Actuator Motor
5 - K8 Blower Motor Control Module
6 - M8 Blower Motor
7 - K33 HVAC Control Module
8 - B7D Air Temperature Sensor - Duct Left Lower
9 - M6L Air Temperature Door Actuator - Left
10 - M37 Mode Door Actuator
11 - B7H Air Temperature Sensor - Duct Left Upper
12 - M6R Air Temperature Door Actuator - Right
13 - B7E Air Temperature Sensor - Duct Right Lower

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Let me know.

Joe

If that is the area, then I would suspect it's actually number 10. That is a mode door actuator and not a blend door. That is responsible for air flow direction.

Tell me. Is it possible for you to have a helper turn the temp controller to cause the noise while you try touching the actuators to see if you can feel it vibrate or grind?

Joe

Yes, number 10 is the mode door actuator. It is an electric motor which has plastic gears inside.

Let me know what you find,

Joe

I believe that is the mode door actuator. It should change if you switch air flow direction.

Let me know.

Joe

Hi,

I went to an auto parts store site and looked up both. They are the same part number. Do you think you may have replaced the wrong one? Hopefully, you still have the old actuator. If you don't, switch the two that are still in the vehicle to confirm they are the same and it makes the temp work correctly.

Joe

That sounds like a plan. Let me know what happens.

Take care,
Joe

Yes, that could be the issue. Were you able to inspect the plastic gears to make sure nothing is broken? When you hear the skipping, that is usually the cause. A broke tooth or two on the plastic gears. Read the intro to this link:

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

This may sound stupid, but I miss the old days. If there was an issue, either a cable broke or came loose. It was always cheap and easy to fix.

Regardless, let me know what you determine. Also, have a great and safe New Year's Eve!

Take care,
Joe

That sounds like fun. What kind of car is it you race?

As far as the actuator, if you feel it, there is a good chance the internals of it have failed. There is a gear on the motor that may be bad or even something could be letting it move around and not make good contact.

Let me know.

Joe

That is really interesting. Do you race on a dirt track?

Now, you made a good point. When you remove the actuator, take a mechanic's mirror and see if anything is damaged on the door. Hopefully that won't be the case.

Take care and if you get the chance, let me know.