SOURCE: Only cold air on passenger side
I would first check and make sure that you have enough Freon in the system, on climate control dual systems only one side will put out cold air if the system is low on Freon. Eventually, both sides will put out warm/hot air if the system continues to loose Freon. As with all leaks the system should be checked and then the leak causing component replaced/repaired.
SOURCE: cold air on passenger side warm air on drivers side
Actuator motors either get a tear in the rubber or a hose is broken and not letting vacuum assist in its opening.
You can try moving the lever by hand and see if the air gets colder on the bad side.
SOURCE: How do you fix the driver side air blend door actuator?
you cannot repair the actuator you need to replace it with new one. These motors turn but get weak with time. if you test it, it works, put it in and it doesn't. this is because the motor is weak, unfortunately GM does not sell these motors separately.
SOURCE: disarm and remove ford expedition air bags
Remove the negative cable from your car battery before replacing car air bags
Deactivate the air bag by removing the air bag fuses. Look in your car owners manual to locate the fuses
Unscrew steering column paneling and remove the airbag bolts on the back side of the steering wheel. Pull out the airbag until you see the back side and unplug the wires
SOURCE: Air conditioner blows hot air after 30 seconds on
I have had this problem. I am not a mechanic...so to correct the issue temporarily, I simply turn off the car and restart. This has worked everytime for me. In extreme cases, I think you can also remove the AC fuse and start the car, which will also reset the computer. I also think that by taking the climate control off the "AUTO" setting has worked in the past.
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