Opener will not run; lights flash six times; sometimes accompanied by a clicking sound from the head unit.

Safety first: Unplug the opener. Capacitors can hold a charge; discharge the capacitor by shorting its terminals with an insulated resistor or follow manufacturer procedures. If unsure, contact a technician.

• Locate the capacitor: On many Craftsman chain-drive units, the start capacitor is a cylindrical component mounted inside the opener housing near the motor.
• Inspect visually: Look for bulging ends, leaking electrolyte, or burn marks. Any of these signs indicate replacement is needed.
• Check connections: Ensure the spade terminals are tight and not corroded. Loose connections can mimic a bad capacitor.
• Replace capacitor: Note the microfarad (µF) rating and voltage printed on the old capacitor. Install an exact-match Craftsman-approved replacement. Transfer wires one at a time to the new capacitor to avoid miswiring.
• Reassemble and test: Reinstall the opener cover, plug the unit back in, and operate the door. If the motor now starts smoothly and the 6-flash code is gone, the repair is successful. Persistent 6 flashes may indicate a motor or logic board issue.