No airflow from the vents
The blower motor, fuse, relay, wiring, control panel or power supply may be responsible.
Cabin fan diagnosis and repair
Heater Blower Motor & Resistor Replacement in South London
If the cabin fan has stopped, works only on certain speeds or makes an unusual noise, SP88 can test the blower circuit before replacing parts.
When to arrange an inspection
Only some fan speeds work
A failed resistor or electronic control module is common, but the circuit still needs confirming.
Noise or intermittent running
Worn motor bearings, a damaged fan, debris or a poor connection can produce noise or cut-outs.
Weak airflow
A blocked pollen filter or airflow restriction can feel like an electrical fault, so it is checked first.
How SP88 approaches the fault
We confirm the reported symptom, inspect the fuse and accessible connections, test power and control signals, and distinguish the motor from the resistor or control module. The correct part and access route are confirmed against the vehicle before replacement.
Service boundary: This service covers cabin heating and ventilation fan faults. It does not include refrigerant or air-conditioning work.
Safety comes first
A failed demister blower can make the vehicle unsafe to use in cold or wet conditions. Do not continue if you cannot keep the windscreen clear.
SP88 covers Wallington, Sutton, Croydon, Purley and nearby South London and Surrey areas. Suitability for mobile work depends on the vehicle, access and the confirmed repair.
Related services
Book or ask first
Send the registration, postcode and a clear description of the symptoms. Planned appointments start on weekdays at 10:00, 12:00 or 14:00. Weekends are closed.
A booking request is not a diagnosis or parts-compatibility confirmation. SP88 will confirm the vehicle details and repair route.