If your AC compressor will not turn on in cold or cool weather, it may be normal protection, a low‑refrigerant safety cutoff, or an electrical fault. Many auto AC systems limit compressor operation at low temperatures, but if it never engages with defrost on rainy, cool days, something may be wrong.
Drivers around Ann Arbor often first notice this problem when the windows fog up in cold rain, and the defrost mode does not clear the moisture. Low refrigerant, faulty pressure switches, or relay or wiring issues can all prevent the compressor from kicking on even when the AC or defrost light is illuminated.
Hoover Street Auto Repair can test your compressor circuit, check refrigerant levels, and confirm that the AC engages properly so your defrost works when Michigan’s weather turns cold and damp.