Midea F02

Midea error code F02 indicates: Midea Lunar Pro / Heat Pump Inverter & Condenser Tumble Dryer: Diagnostic fault code F02 registered by the microcomputer controller. Heat pump evaporator refrigerant coil temperature NTC sensor circuit short-circuited (<100 Ω).

The primary root cause for Midea code F02 is: On Midea appliances engineered with thermodynamic closed heat pump circuit with R134a/R290, dynamic residual moisture sensors, and twin-layer lint filter mesh: Moisture penetration past thermistor sealing crimp on frozen evaporator tube, or wiring insulation cut by fin edges Metrological tolerance verification: measured NTC resistance < 100 Ω (abnormal short); expected nominal 10.0 kΩ at 25°C; insulation to ground > 20 MΩ..

To resolve error code F02: Disconnect mains power before servicing. Unplug the harness at the main PCB and use a calibrated digital multimeter: inspect sensor lead routing across aluminum evaporator fins; disconnect sensor and measure resistance across pins and to ground. Inspect contacts for pin oxidation or loose terminals. Replace defective part if out of tolerance, re-energize and clear error: Close door and turn cycle knob to 6 o'clock. Press and hold Time and Anti-Crease buttons simultaneously for 5 seconds until 'd01' displays. Press Start/Pause to cycle to error log, then hold Start/Pause for 3 seconds to clear faults and return dial to Off.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Midea code F02 persists, the physical component causing On Midea appliances engineered with thermodynamic closed heat pump circuit with R134a/R290, dynamic residual moisture sensors, and twin-layer lint filter mesh: Moisture penetration past thermistor sealing crimp on frozen evaporator tube, or wiring insulation cut by fin edges Metrological tolerance verification: measured NTC resistance < 100 Ω (abnormal short); expected nominal 10.0 kΩ at 25°C; insulation to ground > 20 MΩ. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test Compressor Motor Windings (Run/Start) & Defrost Heater across Across 3 compressor pins (Common, Run, Start): R(C-S) + R(C-R) = R(S-R). Winding to earth: >20MΩ (OL).. Expected nominal reading is 15Ω–25Ω (Run C-R), 20Ω–35Ω (Start C-S), 200Ω–400Ω (Defrost Heater). PTC Relay: 10Ω–30Ω at 25°C.. Tolerance: ±10%. Any low insulation resistance to casing (<2MΩ) trips the breaker. Defrost bimetal reads <0.5Ω when sub-zero..

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.