How to tell if a ceiling fan receiver is bad?

Determining whether a ceiling fan remote control receiver module located inside the canopy has failed involves checking power continuity and signal response. If your wall switch is turned on and the manual pull chains do nothing, but you have fresh batteries in your handheld remote and verified that line voltage is successfully passing into the receiver's black input wires, yet no voltage comes out of the blue or red load wires to the fan motor when buttons are pressed, the receiver module is likely defective. You can troubleshoot receiver failures safely by shutting off the circuit breaker and checking terminal connections with a multimeter. You can verify that your diagnosis is correct when bypassing the receiver entirely by wiring the hot feed directly to the fan motor wires makes the fan run, proving the receiver module is bad and must be replaced.