Peugeot 307 AUC Sensor Fault

Had similar AUC issue with my BMW – Automatic Air Recirculation. Air conditioning sensor was checked too. Symptoms were different, but the blower motor issue makes me think of it. Did you check the fuses for the blower and AUC sensor? Could be a blown fuse.

Which fuses are linked to the blower motor and AUC sensor? Could a bad air conditioning sensor cause this?

When my blower died, I was told a bad air conditioning sensor could cause complete failure. Fuse numbers vary, check your manual, but look at 'ventilation' or 'air conditioning' fuses. Since you checked connections and fuses, get it diagnosed.

Workshop confirmed defective AUC sensor. Mechanic said the cable and plug were faulty. Repair was 95€.