Help in bypassing a defective knob in an airconditioning unit
The defective part is a 12-hour time switch to set how long the AC is to run before it switches off automatically.

When the knob is at 'OFF' position the AC will remain off.
When it is at 'ON' position the AC will run till the knob is turned to 'OFF' position. 

The intermediate positions are for setting the time.

The timer could be run by a motor.

The wires would be 'Line', 'Neutral' &amp; 'Output'.

For bypassing the timer 'Line' &amp; 'Output' are to be shorted.

The 'Line' &amp; 'Output' may be identified using a multimeter. There should be no continuity between 'Line' &amp; 'Output' when the knob is in the 'Off' position. The continuity should be there in all other positions of the knob.