Pontiac Grand Prix HVAC malfunction with passenger side only producing heat and driver side fluctuating temperatures on Pontiac Grand Prix

Some Pontiac Grand Prix owners report experiencing HVAC malfunctions, where the passenger side consistently produces heat while the driver side experiences fluctuating temperatures. This issue may be linked to faulty temperature controls, which can result in the passenger side blowing hot air regardless of the settings. Additionally, a malfunctioning actuator on the driver's side is often cited as a common cause, as it regulates the blend door that controls cabin air temperature. Some owners also note that a defective air control motor may contribute to the temperature imbalance. Furthermore, unusual noises from under the dash when activating the recirculate function could indicate problems with the air circulation system, while issues with the climate control system itself, such as a malfunctioning slide bar or controls, may lead to the driver’s side blowing hot air consistently. It is recommended that owners consult a qualified mechanic or Pontiac specialist to diagnose and address these HVAC issues effectively.