Blend door actuator

[Sirchrisd]

So I've seen a post or two about blend door actuators. I need to change one. One listing said it's behind the glove box. Sounds like an easy fix. One thing I saw somewhere says the dash comes out. Anyone change one out before? How difficult is it to reach?

[89grand]

Do you have climate control or the regular AC? Either way, the dash doesn't have to come out. I just had my drivers side replaced and it can be done from under the dash. I have the climate control.

[Sirchrisd]

It's single climate control. I changed the passenger side by removing the glove box. Problem is still not fixed. I thought it would be the fresh air box. I'll check the dr side
out today.
Thanks

[fnkychkn]

there are 3 actuators on MTC (manual temp control) system.
temp blend - 3 (the one on the right side of housing is not used)
mode - 7
recirc - on air inlet housing (not shown)



btw, welcome to LXforums.
please update your vehicle profile in User CP, thanks.

[Sirchrisd]

If I'm reading the service manual right, my car has only two. I didn't see a second on the passenger side, but I'll check again. Didn't have time today to check driver side. Btw,my job blocks this site, so everything I do on here is done from an iPhone. I'll get around to the profile some day. Thanks for the diagraham, it's a big help!

[Sirchrisd]

Ok, I found all three. Changed them all and still have the same issue.

[wilco]

I am having a similar issue. My 08 with MTC stays on hot for a while after moving the knob to cool. It will burn you out before changing. I do not think it is the actuator since it changes, it just has a delay that takes anywhere from 30 seconds to 3 minutes. It also has no middle ground when doing this, it is either hot or cold. Any ideas?

[fnkychkn]

I am having a similar issue. My 08 with MTC stays on hot for a while after moving the knob to cool. It will burn you out before changing. I do not think it is the actuator since it changes, it just has a delay that takes anywhere from 30 seconds to 3 minutes. It also has no middle ground when doing this, it is either hot or cold. Any ideas?

ENTERING DISPLAY DTC MODE - MTC SYSTEM

To enter the MTC system's Display DTC Mode, perform the following:



NOTE:An active DTC 33 will prevent the control from entering diagnostic mode and performing certain diagnostic functions. It will also prevent proper A/C mode switch and status indicator function. If this occurs, refer to *A/C HEATER CONTROL WILL NOT ENTER DIAGNOSTIC MODE (MTC)
1.Turn the ignition to the On position.
2.Turn the blower motor control (1) to the On position.
3.Press the A/C mode switch (2) down, turn the blower motor control to the Off position, wait until both LEDs illuminate (approximately 5 seconds) and then release the A/C switch. If there are active or stored DTCs to display, the A/C status indicator (3) will begin to flash. If there are no active or stored DTCs to display, the LEDs on the A/C-heater control (4) will turn off and the system will automatically exit the mode of operation.
4.To manually exit Display DTC Mode, either turn the ignition off or disconnect the negative battery cable from the battery.



DISPLAY SEQUENCING - MTC SYSTEM

MTC system DTCs will display in ascending numerical order but not in chronological order. Active DTCs will display before stored DTCs. If there are active and stored DTCs for the same parameter, the A/C-heater control will NOT display the stored DTC for that parameter. The EBL status indicator will illuminate and remain illuminated while the A/C-heater control is displaying stored DTCs. After displaying all active and stored DTCs, the A/C-heater control restarts at the beginning, displaying all DTCs again. To restart the sequence from the beginning while the A/C-heater control is displaying DTCs, press the EBL mode switch down, and then release it. This will cause the A/C-heater control to quit displaying the present code, turn off all LEDs for 2.0 seconds, and then it will begin flashing all DTCs again from the beginning.


READING DIAGNOSTIC TROUBLE CODES - MTC SYSTEM




All active and stored DTCs for the MTC system have an assigned code number. The A/C status indicator flashes in a series of pulses to display the code numbers. Each pulse has an indicator on time of 0.5 seconds. The tens unit value (1) is flashed first followed by the ones unit value (2). A 2.0 second indicator off-time (3) separates the unit values. When displaying multiple DTCs, the A/C status indicator will go off for five seconds (4) before displaying the next DTC (5). After displaying all DTCs (6), the sequence will repeat until exiting Display DTC Mode.


btw, welcome to LXforums.