Why does A/C fog the windows in my car instead of clearing them?

When your defrost or AC makes your windows foggy instead of clear on cold Ann Arbor mornings, it usually means the A/C system on your German auto is not dehumidifying the air properly. Low refrigerant, a weak A/C compressor, or a blend door problem can keep moist cabin air from drying out, so condensation forms on the cool window glass instead of disappearing.

On Michigan winter and shoulder‑season days, wet boots, jackets, and slush tracked into your vehicle add moisture that the HVAC system must remove. If the A/C side of the HVAC system is weak, the defroster blows warm, damp air, so the windows fog and can even re‑fog while you drive.

Stadium Auto Service can test your German auto A/C-defrost performance and check system pressures and airflow, restoring proper de-humidification so your windshield clears quickly on chilly Ann Arbor mornings.