Dishwasher displays C7; cycle may end early and dishes are not dry.

Safety: Disconnect power at the breaker before removing panels or touching wiring.

• Inspect wiring harness: Access the control board area (usually in the door) and the base of the tub. Look for loose, burned, or corroded connectors in the heater and sensor circuits.
• Check thermistor connection: Locate the temperature sensor in the sump area and ensure its connector is fully seated and free of corrosion.
• Reset the dishwasher: After checking connections, restore power and run a short cycle to see if the C7 code clears.
• Test components with a meter: If comfortable using a multimeter, measure resistance of the thermistor and heater according to Monogram specifications (typically a few kΩ for thermistor at room temperature). Replace any component that is open or shorted.

If wiring and components test correctly but the C7 error persists, the main control board is likely at fault and should be replaced or diagnosed by a qualified technician.