Heater not working in position 1, 2, Air Con not working at all?

This problem is usually caused by the resistor pack for the fan motor failing. You can reach the resistor pack inside the glove compartment. There is one electrical connector and one screw fixing it in place. The pack relies on the air flow to cool it as it gets HOT, so best not run it outside the ducting. The new pack costs about £28. Not a difficult job.

Neil
October 2011