Heater fan swith

[JB 2.2]

Got an issue with the heater I have replaced the unit under the dashboard and it still won't work it only works on number 4 switch 123 don't work any ideas at all 

 

[AndyR]

Hi J.B.2.2, I had this problem on my astra when I first got it. It turned out to be the heat control sensor on the heater. I replaced it and all the controls on the heater now work. It was a fiddly job, as on the astra, the glove box had to be removed for the less limited access that is needed. 

Hope this helps. 

Regards Andy. 

[JB 2.2]

I replaced that and still don't worked 

[AndyR]

Ah crap. I was hoping that would have helped, not realising you'd already been down that route. 

[Vauxhall Owners Club]

It is the fan control resistor pack....the resistors between the lower speeds have failed and therefore no resistance to the motor on speed 4 so runs flat out

Replace the resistor pack and that will sort it

[JB 2.2]

Thanks