The Rhythmic Clicking Sound Explained
If you walk into your kitchen and notice a repetitive metallic clicking sound coming from behind your Whirlpool refrigerator every few minutes, accompanied by rising temperatures, your compressor is struggling to jumpstart. This is a classic symptom of a failed start relay capacitor. Acting quickly prevents the internal compressor windings from overheating and burning out completely.
How the Start Relay Mechanism Operates
The start relay is a small solid-state device attached directly to the side of the main cooling compressor cylinder. It delivers a high-amperage current boost to spin up the motor pump components. When the internal ceramic disk cracks due to age, the mechanism cycles continuously, creating that characteristic clicking click pattern without transferring power.
The DIY Fix: Replacing the PTC Assembly
Unplug the appliance power cable immediately. Move the unit outward to access the rear lower service access panel. Unfasten the metal retaining clip holding the small black plastic relay box against the compressor terminals. Shake the device slightly—if it rattles like broken glass, the internal electronics are shattered. Slide on a generic universal replacement kit (costing roughly $15 online) onto the identical three brass pins, plug the machine back in, and your cooling cycle will resume instantly.