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Neff • Central Diagnostic Dictionary

195 Verified Codes in Database

Neff Error Codes & Diagnostics

Access our premium database of error codes, common faults, and professional repair solutions for Neff appliances.

Luxury front-loading washing machine in brushed titanium with illuminated dark glass drum

CodeAppliancesFault / DiagnosticsRepair InstructionsAction

F44

Washing Machine

Drive Motor, Inverter & Tachometer Sensor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: No bidirectional motor rotation F44; drum only turns in one direction during wash tumble, reversing relay stuck.

On Neff washers: Welded contacts or defective coil on motor reversing relay on power control board, or broken track on stator harness.

Inspect motor reversing relays on control board. Measure coil resistance of both reversing relays (nominal ~360–420 Ω). Replace power module if relay is welded. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

F47

Washing Machine

Drive Motor, Inverter & Tachometer Sensor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Motor inverter power module (IPM) overtemperature F47; thermal sensor on aluminum heatsink trips thermal shutdown.

On Neff washers: Severe drum overload, high ambient temperature, dried thermal paste between IPM bridge and heatsink, or dust clogging cooling airflow.

Allow inverter module to cool for 30 minutes. Reduce laundry load. Inspect aluminum heatsink, clean dust, and reapply high-grade non-conductive thermal paste. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

F48

Washing Machine

Drive Motor, Inverter & Tachometer Sensor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Inverter DC bus undervoltage detected F48; rectified high-voltage DC rail drops below minimum threshold (< 200V DC).

On Neff washers: Severe AC mains voltage dip, degraded DC bus bulk electrolytic capacitors, or high resistance on AC filter terminals.

Check mains voltage at wall socket under load (> 207V AC). Measure DC bus voltage across filter capacitors (nominal ~310–330V DC). Replace inverter board. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

F49

Washing Machine

Heating Element, Thermostat & Safety Fuse

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Inverter DC bus overvoltage detected F49; regenerated motor braking energy or AC mains surge exceeds safety limit (> 400V DC).

On Neff washers: Heavy out-of-balance drum deceleration dumping excessive back-EMF, open braking resistor circuit, or lightning surge on AC line.

Check mains line voltage. Measure braking dissipation circuit components on inverter board. Inspect drum suspension springs and dampers to reduce violent sway. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

F50

Washing Machine

Drive Motor, Inverter & Tachometer Sensor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: 3-phase BLDC motor drive hardware fault F50; inverter bridge reports phase current imbalance or shorted IGBT.

On Neff washers: Shorted phase winding in permanent magnet brushless motor, damaged motor power connector, or blown IGBT output switch on PCB.

Disconnect motor plug. Measure 3-phase winding resistances between U-V, V-W, U-W (must be perfectly balanced ~4.5–5.5 Ω). Replace motor or inverter module. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

F57

Washing Machine

Drive Motor, Inverter & Tachometer Sensor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Inverter serial D-Bus communication lost F57; main control module loses serial data link to motor inverter module.

On Neff washers: Broken or disconnected communication wiring harness between upper and lower modules, corroded edge connectors, or unpowered inverter.

Inspect 3-wire communication harness linking main PCB to inverter module. Verify 230V AC mains feed to inverter module. Check 5V DC bus pull-up voltage. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

F59

Washing Machine

Electronic Control Board (PCB) & Bus Communications

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: 3D Hall acceleration sensor signal missing F59; tub motion sensor fails to report 3-axis vibration data during spin.

On Neff washers: Loose or unplugged connector on 3D sensor mounted on outer tub, damaged wiring harness, or failed accelerometer chip on sensor PCB.

Remove top lid. Inspect 3D sensor bolted to top edge of outer plastic tub. Verify 5V DC supply on pins 1-3. Check wiring loom for fatigue breaks. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

F60

Washing Machine

Water Level Pressure Switch & Air Dome

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Flow sensor flow rate out of calibrated bounds F60; discrepancy between flowmeter pulse frequency and pressure rise.

On Neff washers: Partially seized flow turbine wheel, partially blocked pressure switch chamber hose, or water inlet pressure oscillation.

Inspect inline flowmeter and clean turbine chamber. Clean pressure switch air trap and clear any detergent gunk. Verify stable household water pressure. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

F61

Washing Machine

Door Lock Mechanism & Safety Interlock

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Abnormal door lock feedback signal F61; door interlock reports unexpected state changes during high-speed rotation.

On Neff washers: Loose door hinge causing strike hook vibration, pitting on internal copper switch contacts inside door interlock, or loose terminal.

Tighten door hinge mounting screws on front panel. Check harness plug fit on door interlock. Replace door interlock assembly if contacts are pitted. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

F63

Washing Machine

Electronic Control Board (PCB) & Bus Communications

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Functional safety processor watchdog trip F63; internal CPU self-test parity or RAM execution error detected on main PCB.

On Neff washers: Electrostatic discharge (ESD), corrupted EEPROM memory registers, unstable power rail voltage ripple, or damaged microcontroller.

Power down machine at mains for 5 minutes. Inspect power module for ruptured electrolytic capacitors. Replace configured main control PCB. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

F67

Washing Machine

Electronic Control Board (PCB) & Bus Communications

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Configuration variant coding error F67; EEPROM variant data mismatch between user interface and power module.

On Neff washers: Unprogrammed replacement control board installed, corrupted model variant coding block, or incorrect firmware flashing.

Access service mode to enter exact variant coding number from machine rating plate (E-Nr). Re-flash firmware via iService tool or install pre-programmed board. Turn selector to 6 o'clock position, press and hold Spin Speed reduction key, turn selector to 7 o'clock, release key, turn to Off.

Key Symbol

Oven / Microwave

General System & Mechanical Integration

Oven controls are locked and cannot be operated

The child lock feature is activated.

Press and hold the button with the 'key' symbol for approximately 4-5 seconds until the symbol disappears from the display.

U1

Hob / Cooktop

Electronic Control Board (PCB) & Bus Communications

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: Severe connection wiring fault U1; 400V line-to-line voltage applied without neutral reference (missing neutral).

On Neff hobs: Cooktop wired to 400V 3-phase supply with disconnected or loose blue neutral wire in wall connection box.

IMMEDIATELY switch off main breaker! Risk of PCB destruction. Verify terminal bridge between N1-N2 and confirm 230V AC to Neutral on all lines. Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

U2

Hob / Cooktop

General System & Mechanical Integration

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: Phase imbalance voltage anomaly U2; differential voltage between L1 and L2 lines exceeds 40V under active cooking load.

On Neff hobs: Unequal line drop on undersized distribution cable, defective phase selector relay, or high resistance upstream contact.

Measure voltage of L1-N and L2-N simultaneously with cooktop running at power level 9 on both sides. Check junction box terminal tightness. Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

U3

Hob / Cooktop

Electronic Control Board (PCB) & Bus Communications

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: DC bus voltage ripple excessive U3; rectified DC link voltage exhibits ripple voltage > 15% under induction load.

On Neff hobs: Dried out DC bus smoothing filter capacitors (electrolyte leakage) or failing diode inside main bridge rectifier block.

Disconnect power. Discharge DC bus. Check ESR of 400V DC filter capacitors on power board. Test bridge rectifier diodes with DMM (0.4–0.6V drop). Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

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Neff — Complete Error Code Catalog

158 Verified Error Codes

Server-side index of all verified manufacturer error codes for technicians and automated crawlers.

Dishwasher38

E01 E02 E03 E04 E05 E06 E07 E08 E09 E10 E11 E12 E13 E14 E15 E16 E17 E18 E19 E20 E21 E22 E23 E24 E25 E26 E27 E28 E29 E30 E31 E3000 E3100 E3200 E6101 E6900 E9001 E9210

Washing Machine48

E34 E35 E37 E38 E42 E43 E44 E47 E48 E49 E50 E57 E59 E60 E61 E67 F16 F17 F18 F19 F20 F21 F22 F23 F25 F26 F27 F28 F29 F31 F34 F35 F36 F37 F38 F42 F43 F44 F47 F48 F49 F50 F57 F59 F60 F61 F63 F67

Tumble Dryer16

E32 E36 E51 E52 E53 E54 E55 E56 E63 E71 E72 E73 E74 E75 E89 E90

Oven / Microwave19

E005 E011 E101 E104 E106 E115 E305 E310 E395 E396 E845 E5116 E5122 Er1 Er2 Er4 Er6 Er8 Key Symbol

Hob / Cooktop36

d0 d1 d2 d3 d4 d5 d6 d7 d8 d9 E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 E0513 E7015 E8207 F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 U1 U2 U3

Refrigerator / Freezer1

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