Dishwasher fills but does not heat; cycles run cold and E2 is displayed near the end of the program.

Safety first: Disconnect power at the breaker. Heating components can retain voltage and remain hot after use.

• Confirm symptom: Run a hot program and open the door mid-cycle (after pausing). If the water and interior are cold and E2 appears, the heater circuit is suspect.
• Access heater assembly: Remove the dishwasher from the cabinet if necessary. Lay it on its back with towels. The flow-through heater is typically mounted in-line with the circulation pump under the tub.
• Check heater resistance: Disconnect the heater connectors and measure resistance with a multimeter. A typical value is 20–30 Ω. If the circuit is open (infinite resistance), replace the heater assembly.
• Inspect NTC sensor: Locate the NTC (temperature sensor) in the sump or attached to the heater housing. Check for corrosion or broken wires. Measure resistance at room temperature and compare to service specs; replace if out of range.
• Control board and wiring: Inspect the main control module (behind the door panel) for burned heater relay contacts or darkened PCB areas. Check wiring from the board to the heater for heat damage. Replace the control board if the relay is visibly damaged or if it fails continuity tests.

Because the heater circuit involves mains voltage and water, if you are not experienced with electrical testing, have a qualified technician perform these checks and repairs.