Probably the left side air temperature actuator is bad . electric motor that controls opening an closing of temp door in the HVAC case . No the computer doesn't need to be reset .
Temperature Valve Actuator Replacement - Left Side
Removal Procedure
Remove the left instrument panel insulator. Refer to Instrument Panel Insulator Panel Replacement - Left Side in Instrument Panel, Gauges and Console.
Remove the knee bolster. Refer to Knee Bolster Replacement in Instrument Panel, Gauges and Console.
Disconnect the electrical connector from the left air temperature actuator.
Remove the mounting screws from the left air temperature actuator.
Remove the left air temperature actuator.
SOURCE: the cars climate control running hot on the passenger side
I had the same issue, where the driver side blew hot and passenger side cold. Took it to the dealer and they charge me 6oo dollars to change the air actuator value. This value (next to radiator) is what controls the coolant flow for the dual climate control.
After having this done and looking at the change, I became more than a bit
Agitated.... A thought occurred to me that a radiator flush would have resolved the issue and saved me 600 dollars. What lead me to that conclusion are two things
1) Mechanic said when he clamped of the other side of he value the issue resolved itself meaning the value was not bad.
2) This issue only happen after I turned on the heater for the first time this season...
SOURCE: climate zone problems
Hello, This is because your actuator door in the dash board is broken. its about $1000 to fix. Its a bad design flaw that Jeep used in their dual climate control. Many many many jeep owners have had this problem.
SOURCE: 2004 chevy tahoe, dual climate control, blowing different temps
Its more then likely the temp door broken or temp door motor broken/stuck. There is 2-3 of these motors under the dash on the side of the evap/heater core box. Some require extensive labor to replace, good luck
SOURCE: 99 Buick Regal LS dual climate control. No heat passenger side.
the motor for the passenger side
blend door is shot
SOURCE: 1999 pontiac grand prix gtp dual airconditioning
Two things can be the problem,first,try adding ,a little freon,if it is low,it will only cool one side,then if this does not help,there is a door actuator motor that controls this,it could be not working,the dash has to come out to replace this actuator motor,if this was at all helpful,please rate,thank you.
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