Daewoo HE

Daewoo error code HE indicates: Daewoo DDW Series Ultra Clean AquaStop Dishwasher: Diagnostic fault code HE registered by the microcomputer controller. Heating circuit power control relay contact failure or open solder joint on main power circuit board.

The primary root cause for Daewoo code HE is: On Daewoo appliances engineered with hydraulic high-pressure wash pump, triple fine-mesh sump filter, electronic overflow float switch, and inline flow-through heating element: Burned relay contacts due to high inrush current, cracked PCB solder connection on relay pins, or defective coil driver Metrological tolerance verification: PCB heater relay coil resistance 380 Ω to 440 Ω (12V DC coil); open contacts resistance > 10 MΩ de-energized..

To resolve error code HE: Disconnect mains power before servicing. Unplug the harness at the main PCB and use a calibrated digital multimeter: inspect back of main PCB for discolored/burnt solder points at heater relay pins; test relay coil resistance (380-440 Ω). Inspect contacts for pin oxidation or loose terminals. Replace defective part if out of tolerance, re-energize and clear error: Switch machine off. Press and hold Program and Delay buttons together while pressing Power On. Hold for 4 seconds until status LEDs flash rapidly. Press and hold Start/Pause for 3 seconds until the drain pump activates for a 30-second cycle to purge water and clear error lock.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Daewoo code HE persists, the physical component causing On Daewoo appliances engineered with hydraulic high-pressure wash pump, triple fine-mesh sump filter, electronic overflow float switch, and inline flow-through heating element: Burned relay contacts due to high inrush current, cracked PCB solder connection on relay pins, or defective coil driver Metrological tolerance verification: PCB heater relay coil resistance 380 Ω to 440 Ω (12V DC coil); open contacts resistance > 10 MΩ de-energized. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test Mechanical Pressure Switch Contacts / Inductive Frequency Sensor across Across switch spade contacts with harness unplugged; electronic output: 40Hz–50Hz frequency signal. Expected nominal reading is Mechanical: Continuity 0.0Ω–0.2Ω (Empty: 11-12, Full: 11-14). Electronic: 20Ω–45Ω coil resistance.. Tolerance: Mechanical switch contacts must transition cleanly on gentle breath pressure. Coil ~22Ω ±5%..

Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.