Got a problem with the heater fan control on my 2000 HGT in that when I hit a bump in the road and the fan control is set to auto, it switches off. If you then switch the heater to off (0), then the heater seems to switch to auto. When you hit another bump (or it decides that it's had enough irritating me!), it reverts back to working properly again. If you set it to 1,2,3 or 4 then the heater works as it should.

I assume that it's a wiring problem with the switch - has anyone else suffered this, and if so, how do I remove / replace the switch?

Cheers
Nick