Relays with sticky contacts should be

• A. Replaced
• B. Repaired
• C. Reused
• D. Recalibrated

Answer: (A)

Sticky contacts on a relay indicate wear or welding that prevents the switch from opening and closing reliably. This can cause the circuit to stay energized or fail to energize when needed, leading to overheating, arcing, nuisance trips, or equipment damage. Cleaning or repairing such contacts doesn’t restore reliable operation, and the risk of future failure remains. Replacing the relay ensures the control circuit operates correctly and safely. Recalibration isn’t applicable to a mechanical switch, and reusing or repairing without replacing can compromise safety and reliability.