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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

F1

Hob / Cooktop

Heating Element, Thermostat & Safety Fuse

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: LED display driver communication failure F1; touch user interface display controller communication dropout.

On Neff hobs: Faulty 7-segment driver IC, damaged serial clock trace, or cracked surface-mount resistor array.

Inspect UI board for cold solder joints around display ICs. Verify 3.3V DC supply to display drivers. Replace touch user interface if corrupted. Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

F2

Hob / Cooktop

General System & Mechanical Integration

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: Cooking zone safety thermal shutdown F2; zone overheated and automatically turned off to protect glass surface.

On Neff hobs: Pan boiled dry at high power, inadequate cabinet bottom ventilation gaps, or defective zone temperature probe.

Remove pan and let cooktop cool down completely. Check cabinet airflow gaps (minimum 5mm front air intake required). Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

F3

Hob / Cooktop

NTC Temperature Sensor & Thermistor

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: Electronic heat sink over-temperature F3; power module aluminum heatsink thermistor exceeds 85°C limit.

On Neff hobs: Blocked cooling air intake underneath cooktop, cooling fan failure, or degraded thermal pad on IGBT heat sink.

Check under-counter ventilation space. Test cooling fan operation in service mode. Measure heatsink NTC resistance (~10 kΩ at 25°C). Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

F4

Hob / Cooktop

General System & Mechanical Integration

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: Safety time-limit auto shutdown F4; cooking zone has operated continuously without setting adjustments past limit.

On Neff hobs: Normal safety feature triggered when zone left unattended on constant power level for extended duration (1 to 10 hours).

This is not an electronic defect. Touch any key on the control panel to acknowledge the safety shutdown, then re-select power level. Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

F5

Hob / Cooktop

General System & Mechanical Integration

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: Control panel overheating warning F5; touch sensors detect excessive heat radiated from hot cookware placed over controls.

On Neff hobs: Hot cooking pot, frying pan, or baking sheet positioned partially or completely over front capacitive touch keys.

Immediately remove hot cookware away from the touch control zone. The fault code clears automatically once touch surface cools down. Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

F6

Hob / Cooktop

General System & Mechanical Integration

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: Touch key continuous activation F6; liquid spillage or object resting on touch panel buttons for > 10 seconds.

On Neff hobs: Overboiled soup or water covering capacitive buttons, damp dishcloth left on glass, or metal utensil lying on slider.

Remove any objects or cloth from the glass. Thoroughly wipe dry the touch control area with a clean dry microfiber cloth. Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

F7

Hob / Cooktop

General System & Mechanical Integration

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: Zone switching relay failure F7; power relay contact stuck welded or relay driver transistor shorted.

On Neff hobs: Heavy inductive load arcing welding 16A zone relay contacts, or failed flyback suppression diode on relay coil.

De-energize hob. Check relay output contacts for continuity without power (must read open circuit ∞ Ω). Replace power relay board if stuck. Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

F8

Hob / Cooktop

Electronic Control Board (PCB) & Bus Communications

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: Resonant circuit frequency drift F8; induction coil resonant operating frequency outside calibrated window (20–45 kHz).

On Neff hobs: Degraded high-voltage polypropylene resonant capacitor, loose coil screw terminals, or cracked ferrite core rods.

Disconnect mains. Measure resonant film capacitors on power module with capacitance meter (nominal ~0.22–0.68 µF). Tighten coil terminals. Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

F9

Hob / Cooktop

Electronic Control Board (PCB) & Bus Communications

Neff N 70 / N 90 TwistPad® / TwistPad Fire® & FlexInduction hob: Auxiliary DC low-voltage rail out of regulation F9; 5V DC logic or 12V DC relay rail out of ±10% tolerance band.

On Neff hobs: Failing flyback switch-mode power supply IC (e.g. LNK/Viper), swollen electrolytic filter capacitor, or shorted optocoupler.

Inspect power board secondary side for bulged capacitors. Measure DC voltages at test points (TP5V = 5.0V ±0.25V, TP12V = 12.0V ±0.8V). Replace PCB. Remove TwistPad magnetic dial, clean glass surface, replace TwistPad on red illuminated ring, hold Key symbol for 4 seconds.

F16

Washing Machine

Door Lock Mechanism & Safety Interlock

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Door interlock open fault F16; appliance cannot start wash program because door latch contacts remain unmade.

On Neff washers: Laundry trapped between door glass and rubber bellows, worn mechanical latch strike hook, or open circuit in PTC door lock coil.

Press door firmly until it clicks. Inspect door hook for mechanical damage. Measure resistance across door lock terminals 1 and 3 (nominal ~180–240 Ω). 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.

F17

Washing Machine

Water Inlet Valve, Aquastop & Flowmeter

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Water inlet timeout alarm F17; appliance fails to reach required wash level within 5 minutes of filling.

On Neff washers: Closed water supply tap, kinked fill hose, clogged mesh filter in AquaStop inlet valve, or defective solenoid valve coil (~4.0–4.5 kΩ).

Verify water tap pressure (min 10 L/min bucket test). Unscrew hose and clean inlet filter screen. Measure solenoid valve coil resistance (~4.0–4.5 kΩ). 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.

F18

Washing Machine

Drainage System & Drain Pump

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Draining timeout failure F18; washer fails to evacuate tub wastewater within programmed 6-minute window.

On Neff washers: Coins, hairpins, or lint clogged in coin trap filter, kinked drain hose, blocked sink standpipe, or seized drain pump impeller.

Drain residual water via emergency drain tube. Unscrew pump filter cap and clear debris. Verify free rotation of pump impeller. Test drain pump (~140–180 Ω). 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.

F19

Washing Machine

Heating Element, Thermostat & Safety Fuse

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Heating timeout error F19; wash water temperature fails to increase by at least 4°C within 15 minutes of heating.

On Neff washers: Open-circuit wash heating element (nominal ~24–28 Ω), open thermal fuse on element flange, or defective heater relay on main control PCB.

Disconnect power. Measure resistance across tubular heater terminals (nominal 24–28 Ω; open if infinite). Check heater relay 12V DC coil on 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.

F20

Washing Machine

NTC Temperature Sensor & Thermistor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Unexpected heating fault F20; heater energized during cold rinse or water heats up without active command.

On Neff washers: Welded heater relay contacts on power PCB, ground leakage shorting heater to chassis, or corrupted NTC analog feedback signal.

Check heater relay contacts for continuity when unpowered (must be normally open, infinite resistance). Replace power control PCB if contacts are shorted. 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.

F21

Washing Machine

Drive Motor, Inverter & Tachometer Sensor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Motor drive / rotation failure F21; drum does not rotate, drive motor fails to turn or accelerate into spin.

On Neff washers: Worn carbon brushes (< 12 mm on collector motors), open tachometer generator coil (~15–20 Ω), or BLDC motor inverter failure.

Check carbon brush length (replace if < 12 mm). Measure tachometer coil resistance (~15–20 Ω) while spinning drum. For BLDC motor, verify 3-phase resistance (4.5 Ω). 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.

F22

Washing Machine

NTC Temperature Sensor & Thermistor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Wash tub NTC temperature sensor fault F22; thermistor signal open circuit or shorted to ground, cycle runs cold.

On Neff washers: Defective NTC thermistor inside heating element collar, corroded terminal connector, or pinched wiring harness in lower chassis.

Measure NTC resistance at 2-pin connector (nominal ~10 kΩ at 20°C, ~4.9 kΩ at 40°C, ~2.5 kΩ at 60°C). Replace NTC sensor if reading is 0 Ω or infinite. 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.

F23

Washing Machine

Drainage System & Drain Pump

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: AquaStop base float switch activated F23; water leak detected in bottom pan, safety drain pump runs continuously.

On Neff washers: Water leak from cracked tub bellows gasket, loose hose clamp on drain pump, split inlet dispenser hose, or tub seam leak.

Disconnect mains. Tilt washer backwards 45° to drain base tray and drop float switch. Locate water leak source and replace ruptured hose/gasket. 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.

F25

Washing Machine

Drainage System & Drain Pump

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Turbidity AquaSensor optical fault F25; infrared sensor cannot evaluate rinse water cloudiness or clarity.

On Neff washers: Heavy soap scum / detergent residue on optical prism, disconnected 3-pin harness, or damaged IR phototransistor.

Inspect optical AquaSensor mounted on sump drain hose. Clean optical glass with isopropyl alcohol. Check 5V DC supply and signal line to 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.

F26

Washing Machine

Water Level Pressure Switch & Air Dome

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Analog pressure sensor voltage out of range F26; sensor output signal voltage drops below 0.5V DC or exceeds 3.5V DC.

On Neff washers: Blocked pressure chamber air trap, split or disconnected rubber hose, or internal piezoresistive sensor element drift.

Remove top lid. Inspect rubber hose between air trap and analog sensor. Clear pressure chamber with warm water. Measure 5V DC supply and sensor 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.

F27

Washing Machine

Electronic Control Board (PCB) & Bus Communications

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Pressure sensor zero-point calibration drift F27; sensor reports residual water pressure with completely empty tub.

On Neff washers: Trapped air pressure in sensor tube due to clogged sump trap, mechanical membrane fatigue, or damaged electronic amplifier on PCB.

Disconnect pressure hose at sensor while tub is empty to equalize atmospheric pressure. Reattach hose securely with spring clamp. Replace sensor if drift persists. 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.

F28

Washing Machine

Water Inlet Valve, Aquastop & Flowmeter

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Flow sensor impulse signal missing F28; water enters soap dispenser but reed switch flowmeter counts 0 pulses.

On Neff washers: Jammed flowmeter turbine wheel (grit/scale deposit), broken reed switch capsule, or disconnected 2-pin harness to main PCB.

Locate inline flowmeter behind inlet valve. Check turbine rotation under water flow. Verify continuity and square wave pulse output with oscilloscope/multimeter. 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.

F29

Washing Machine

Water Inlet Valve, Aquastop & Flowmeter

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: No water inflow detected F29; inlet valves energized but pressure sensor detects zero water accumulation.

On Neff washers: Building main stopcock closed, kinked inlet hose, completely frozen fill hose in unheated laundry, or blown inlet triac.

Verify water tap is fully open and water flows freely into bucket. Ensure fill hose is unkinked and thawed. Measure 230V AC across valve coils when energized. 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.

F31

Washing Machine

Water Level Pressure Switch & Air Dome

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Maximum safety water level exceeded F31; overflow protection trips, inlet valves closed and drain pump energized.

On Neff washers: Mechanically jammed inlet solenoid valve seat, shorted inlet triac continuing to feed coil, or clogged air trap creating false pressure.

Shut off water tap. If water continues filling while unplugged, replace defective inlet valve assembly. If water stops when unplugged, replace power 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.

F34

Washing Machine

Door Lock Mechanism & Safety Interlock

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Door interlock failed to lock F34; solenoid pulse sent but lock mechanism fails to engage or confirm locked contact.

On Neff washers: Jammed lock slider mechanism, broken bimetal / solenoid lock coil, bent door hinge preventing full engagement, or blown lock triac.

Inspect door latch alignment and hinge tightness. Test door lock mechanism resistance across pins 1 and 3 (~180–240 Ω). Replace door interlock switch. 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.

F35

Washing Machine

Water Level Pressure Switch & Air Dome

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Door interlock failed to unlock F35; door remains locked at cycle end, unlock pulse fails to release mechanism.

On Neff washers: Mechanically jammed slider inside door latch, high tub water level preventing safe unlock command, or shorted unlock coil.

Pull emergency manual door release strap inside bottom filter flap. Check for standing water in tub and drain manually. Replace door interlock assembly. 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.

F36

Washing Machine

Heating Element, Thermostat & Safety Fuse

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Door interlock sensing circuit fault F36; feedback line to microcontroller remains inconsistent with lock driver state.

On Neff washers: Burnt SMD sense resistor on control board, high contact resistance on door switch plug, or damaged driver triac.

Disconnect mains power. Measure resistance across door interlock switch contacts. Inspect power board for burnt tracks near door triac. 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.

F37

Washing Machine

NTC Temperature Sensor & Thermistor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: NTC sensor resistance open or high deviation F37; temperature value reads unrealistic cold (<-10°C) during wash.

On Neff washers: Internal fracture in NTC ceramic bead, broken wire in lower wiring loom under tub vibrations, or loose sensor connector plug.

Measure NTC resistance directly at heater terminals (nominal ~10 kΩ at 20°C, ~4.9 kΩ at 40°C). Check wire continuity up to main PCB connector. 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.

F38

Washing Machine

NTC Temperature Sensor & Thermistor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: NTC temperature sensor short-circuit fault F38; sensor lines shorted together or to ground, reading > 120°C.

On Neff washers: Melted wire insulation chafing against metal tub frame, internal breakdown in thermistor body, or water bridging connector pins.

Measure NTC resistance (must NOT be 0 Ω or < 500 Ω at room temperature). Inspect wiring for chafing against chassis. Replace NTC sensor. 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.

F42

Washing Machine

Drive Motor, Inverter & Tachometer Sensor

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Uncontrolled motor runaway speed error F42; drive motor revs instantly to maximum RPM without speed ramping control.

On Neff washers: Shorted motor control triac on power module, defective optocoupler gate driver, or loose tachometer magnet on motor shaft.

Inspect motor tail shaft to ensure tachometer magnet is firmly threaded. Test motor triac pins A1 and A2 on PCB (must not be shorted 0 Ω). 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.

F43

Washing Machine

Heating Element, Thermostat & Safety Fuse

Neff N 50 / N 70 / N 90 Efficient SilentDrive washing machine: Motor stalled / drum rotation mechanically locked F43; drive motor energized but drum cannot rotate.

On Neff washers: Foreign object (bra underwire, coin, sock) jammed between inner drum and tub, seized drum tub bearings, or derailed poly-V drive belt.

Disconnect mains. Rotate drum by hand to check for stiffness. Remove heating element to extract jammed objects from bottom of tub. Check belt. 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.

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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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