11. Attach dial knob on replacement control, locating “off” position of dial the same as on the original. 12. Turn dial to normal position or mid-scale position. 13. Turn on electrical power and check the control's operation. Allow sufficient time for the unit to reach normal operating temperature. 14. Readjust the dial knob colder or warmer, as required. MOUNTING COLD CONTROLS WITH ORIGINAL MOUNTING BRACKET'S HARDWARE 1. Select required mounting bracket that matches the original. Figure 4. 2.