What is wrong if my car's heat and AC are weak after winter?

If your German car has poor heat output and weak A/C output, the root cause is often airflow, not just temperature. A plugged cabin air filter, a debris‑coated evaporator or heater core, or a failing blower motor can restrict airflow for both heating and cooling.

Ann Arbor’s winters bring road salt, sand, and grit that can collect in the cowl air inlet area and on the cabin filter, choking off HVAC airflow. Even if your heater core and A/C refrigerant charge are fine, you will only get a small trickle of lukewarm or cool air from the vents.

Stadium Auto Service can inspect your German auto HVAC blower fan, cabin filter, and ducting to restore strong airflow for both winter heat and summer A/C in Ann Arbor.