Daewoo H1

Daewoo error code H1 indicates: Daewoo Built-in Convection Oven & KOR Combi Microwave: Diagnostic fault code H1 registered by the microcomputer controller. Magnetron tube safety thermal protector switch open (>120°C) due to severe thermal overload.

The primary root cause for Daewoo code H1 is: On Daewoo appliances engineered with convective hot air turbine, cavity PT1000/NTC thermistor probe, high-voltage transformer/magnetron assembly, and safety door interlock switches: Magnetron cooling airflow fan stalled, exhaust louvers blocked, wave guide mica plate carbonized, or reflective arcing Metrological tolerance verification: magnetron thermal switch contact resistance < 0.1 Ω (continuity) below 100°C; filament resistance < 1.0 Ω..

To resolve error code H1: Disconnect mains power before servicing. Unplug the harness at the main PCB and use a calibrated digital multimeter: allow oven to cool for 30 minutes; test thermal switch continuity (<0.1 Ω); inspect waveguide mica plate for burn spots. Inspect contacts for pin oxidation or loose terminals. Replace defective part if out of tolerance, re-energize and clear error: Clear oven cavity. Press Stop/Clear key twice. Disconnect mains plug or circuit breaker for 60 seconds. Reconnect, then touch and hold Clock and Auto Cook keys simultaneously for 5 seconds until a melodic chime confirms control board calibration reset.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Daewoo code H1 persists, the physical component causing On Daewoo appliances engineered with convective hot air turbine, cavity PT1000/NTC thermistor probe, high-voltage transformer/magnetron assembly, and safety door interlock switches: Magnetron cooling airflow fan stalled, exhaust louvers blocked, wave guide mica plate carbonized, or reflective arcing Metrological tolerance verification: magnetron thermal switch contact resistance < 0.1 Ω (continuity) below 100°C; filament resistance < 1.0 Ω. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test NTC Temperature Sensor Probe (Thermistor) across Across sensor pins 1-2 (unplugged harness). Expected nominal reading is 4.8kΩ–12kΩ (at 20°C–25°C). Tolerance: Negative temperature coefficient: resistance drops smoothly when warmed with fingers. OL = open circuit..

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.