What is the reason for uneven cooling in the Cadillac ATS air conditioning system?
2 Answers
Reasons for uneven cooling in the Cadillac ATS air conditioning system are as follows: 1. Air vent issue: A malfunction in one of the air vent servo motors can cause one side of the air conditioning to not cool. 2. Stuck air valve plate: A stuck air valve plate obstructs the rotation of the valve plate, affecting the airflow on one side. 3. Control function: If it is an automatic air conditioning system, the dual-zone control function might be activated; simply deactivate the dual-zone air conditioning function. 4. Insufficient refrigerant: There might be a leak in the air conditioning system. It is necessary to inspect and then add refrigerant; otherwise, this phenomenon may recur after some time.
I previously encountered the issue of uneven cooling in my Cadillac ATS, where one side of the AC was blowing cold air while the other side was warm—a fairly common problem. The main cause is usually a malfunctioning temperature blend door, which is located behind the dashboard and controls the distribution of hot and cold air. If the motor on one side gets stuck or the linkage breaks, it leads to imbalance. Another possible cause is insufficient or leaking refrigerant, resulting in uneven cooling. Alternatively, blocked air ducts due to dust buildup can obstruct the vents. I recommend not ignoring this issue. Start by checking if the cabin air filter is dirty, as a clogged filter can disrupt airflow distribution. DIY repairs are tricky due to the high level of system electrification—tampering without expertise might damage other components. It’s best to visit a professional repair shop immediately for diagnosis; they’ll use tools to measure airflow and cooling performance. From a safety perspective, adjusting the AC while driving can be distracting and increase risks. For regular maintenance, remember to clean or replace the filter every six months to prevent such issues.
