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

When you have weak heat in winter and weak AC in early spring, 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 collect in the cowl area and on the cabin filter, choking off airflow. Even if your heater core and AC refrigerant charge are fine, you will only get a small trickle of lukewarm or cool air from the vents.

Hoover Street Auto Repair can inspect your HVAC blower fan, cabin filter, and HVAC ducting to restore strong airflow for both winter heat and summer AC in Ann Arbor.