Help, this morning my heater blowert was working fine on all 4 speeds, this evening after having a clifford alarm fitted the motor only blows on 4th speed, nothing at all on 1-3.
Can anyone help?

 

Robby, sounds like somethings been left off or knocked off!! Check under the passenger side of the dashboard and using a torch you should be able to see if any plugs are loose or fallen out. i'm sure there is a resistor under there, which when disconnected only lets the fan work on flat out!!! hope this helps!!

 

Thanks, took the car back to the alarm "experts" and found they hadn't connected one of the plugs.