Dishwasher displays 4C2 and stops; often related to excessively hot water supply.

Safety: Turn off power at the breaker before service.

• Measure inlet temperature: Use a thermometer at the kitchen tap. If above manufacturer’s recommended limit, reduce water heater setting.
• Check plumbing: Confirm the dishwasher is not connected to a dedicated high-temperature loop or recirculation line that exceeds spec.
• Run a cold-water test: Temporarily connect the dishwasher to a cold or lukewarm supply and run a quick cycle. If 4C2 disappears, the issue is water temperature, not the machine.
• Inspect thermistor: If error persists with normal water temperature, the thermistor in the sump may be out of range and should be tested/replaced.