Intervention performed on a light vehicle following a malfunction of the cabin heating and ventilation system.

Customer observation: total lack of ventilation despite using the controls.

Performance of a complete system diagnostic.

Inspection of the ventilation motor and the heating resistor: components are functional.

Verification of the electrical circuit as well as the heater assembly.

After analysis, identification of a fault in the heating control unit, preventing the ventilation from operating.

Parts replaced / intervention:

Complete electrical diagnostic performed

Defective heating control unit identified

No parts replaced