I had a similar problem. Looked up on line and someone posted:
1. Turn the car to "on" but don't start
2. Press the OFF button on the heater two times
3. Turn ignition OFF - wait 30 seconds
4. Turn ignition ON - but don't start
5. Wait 3 - minutes then start vehicle...
Good Luck..
Hope this will reset the computer...
heater control valve is bad on the drivers side.
sounds like you need an A/C programmer
Some 1887 Corvettes came with separate driver and passenger climate controls. The most likely cause is the control system, running a self test will show if the vent doors are operating properly. If the control is ok then the diverter door system is stuck.,
the problem is a part called the air temperature control blend door actuator motor, it is deep inside the dash and the dash must be removed to replace it.
Dissconnect the battery for 1 hour and reconnect, should re-set the flaps!
make sure both knobs are all the way up on red for heat...
A broken blend air door is the most likely cause on a Jeep Grand Cherokee.
There is a differential vane in the AC ductwork that regulates the flow of hot and cold air into the two halves (driver/passenger) of the system. Failure of this mechanism is one of the more notorious problems with the LS.
Temp blend door actuator malfunction.
When my a/c system is low on refrigerant, it blows hot on drivers side, cold on passenger side of the dashboard. This is a 1997 Buick Ultra. Recharging the system solves the problem.
One of the temp blend door actuators has failed.
An air conditioner blows out heat