Step1: Disconnect all electrical power and allow equipment to cool completely.
Step2: Remove access panel and locate the existing hi-limit control and sensing bulb.
Step3: Carefully disconnect wiring terminals, labeling them for correct reconnection.
Step4: Remove the old control and bulb from its mounting tube.
Step5: Install the new hi-limit control and position the bulb securely.
Step6: Tighten the stuffing box and reconnect wiring firmly.
Step7: Restore power and test safety cut-off function for proper operation.