Identifying whether a ceiling fan's internal pull-chain switch or wall control switch has gone bad involves checking continuity and operational response. If pulling the chain through its multi-speed sequence produces no change in fan speed, or if the fan remains completely dead despite verified power reaching the motor housing, the mechanical switch contacts inside may be worn, pitted, or broken. First, ensure safety by shutting off the circuit breaker. Second, access the switch housing and test continuity across the terminals using a digital multimeter set to ohms. You can troubleshoot switch failures safely. You can verify that your test is successful when the multimeter shows zero resistance in the "on" position and infinite resistance in the "off" position, confirming whether the switch is functional or needs replacement.
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