If your AC blows cold on one side and warm on the other, the problem is usually with HVAC housing blend doors or temperature controls, not the AC refrigerant charge. Stuck blend door actuators or mis‑calibrated climate controls can send different temperature air to each side of the cabin.
You may notice “driver side cold, passenger warm” or the reverse, especially when mornings are chilly and afternoons mild around Ann Arbor. Dual‑zone systems are more prone to this because each side has its own doors and actuators that can fail independently.
Hoover Street Auto Repair can diagnose auto HVAC blend door and control issues so your car's cabin stays evenly comfortable on those mixed‑temperature Michigan days.