I have a 97 Mondeo that displays an intermittant fault with the heater blower fan.
It always works on position 4 but doesn't always work on 1,2 and 3.
I have already changed the resistor which temporarily solved the problem. However, whenever it rains heavily or I wash the car, it stops working on 1,2 and 3 again and takes a couple of weeks before it works OK again. Any ideas?

Steve Poar, July 2005

Did you replace the connecting plug on the wiring loom into the resistor,It normally burns out as well causing a poor connection.

Trevor Foskett, July 2005