Hi thats exactly what it does. I bought a used control pannel thinking it was that - but still it doesn't work ! when i start the car, the fan may show as on speed 3 but no working fan, for a while you can alter the fan speed with the +/- button (but still no fan) then the fan speed segments disapear leaving the outline off the sign. Also you cannot turn off the control pannel by pressing the - button? ( which is why i suspected the control pannel). thanks John