Step1: Disconnect electrical power at the breaker and confirm no voltage is present before servicing.
Step2: Remove control panel to access the fan switch and note all wire positions.
Step3: Detach old switch from mounting cutout and disconnect terminals.
Step4: Install new switch into the opening and secure it firmly in place.
Step5: Reconnect wires to matching terminals ensuring tight, correct SPDT configuration.
Step6: Restore power and test fan operation through all switch positions before returning to service.