Access our premium database of error codes, common faults, and professional repair solutions for Bosch appliances.
Bosch Serie 4 / Serie 6 / Serie 8 ActiveWater & PerfectDry Zeolith: Zeolith heat pump overheating safety trip E31; thermal cutout on drying container activated.
On Bosch dishwashers: Blocked drying air inlet or exhaust inside tub, fan blower failed...
Check drying air outlet cap in right rear corner of tub for obstructions. Measure Zeolith...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Maximum safety water level exceeded E31; overflow protection trips, inlet valves closed and drain pump energized.
On Bosch washers: Mechanically jammed inlet solenoid valve seat, shorted inlet triac...
Shut off water tap. If water continues filling while unplugged, replace defective inlet...
Bosch Serie 6 / Serie 8 / HomeProfessional AutoClean SelfCleaning Condenser: Moisture sensor conductivity circuit anomaly E32; sensor electrode strips report open circuit or permanent wet state.
On Bosch tumble dryers: Fabric softener / lime scale film insulating stainless sensor...
Clean stainless sensor bars inside front opening with white vinegar. Inspect rear drum...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Drum unbalanced load distribution warning E32; appliance aborts final spin or reduces speed to prevent vibration damage.
On Bosch washers: Single heavy item (e.g. bath mat, duvet, bathrobe) rolled into ball,...
Pause program, open door, redistribute laundry evenly inside drum, or add small towels to...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Door interlock failed to lock E34; solenoid pulse sent but lock mechanism fails to engage or confirm locked contact.
On Bosch washers: Jammed lock slider mechanism, broken bimetal / solenoid lock coil, bent...
Inspect door latch alignment and hinge tightness. Test door lock mechanism resistance...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Door interlock failed to unlock E35; door remains locked at cycle end, unlock pulse fails to release mechanism.
On Bosch washers: Mechanically jammed slider inside door latch, high tub water level...
Pull emergency manual door release strap inside bottom filter flap. Check for standing...
Bosch Serie 6 / Serie 8 / HomeProfessional AutoClean SelfCleaning Condenser: Door interlock switch open during program E36; door catch pops open or microswitch contacts bounce during rotation.
On Bosch tumble dryers: Worn plastic door catch strike, loose door hinge screws, or pitted...
Adjust and tighten door hinge screws. Inspect door latch strike for wear. Test microswitch...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Door interlock sensing circuit fault E36; feedback line to microcontroller remains inconsistent with lock driver state.
On Bosch washers: Burnt SMD sense resistor on control board, high contact resistance on...
Disconnect mains power. Measure resistance across door interlock switch contacts. Inspect...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: NTC sensor resistance open or high deviation E37; temperature value reads unrealistic cold (<-10°C) during wash.
On Bosch washers: Internal fracture in NTC ceramic bead, broken wire in lower wiring loom...
Measure NTC resistance directly at heater terminals (nominal ~10 kΩ at 20°C, ~4.9 kΩ at...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: NTC temperature sensor short-circuit fault E38; sensor lines shorted together or to ground, reading > 120°C.
On Bosch washers: Melted wire insulation chafing against metal tub frame, internal...
Measure NTC resistance (must NOT be 0 Ω or < 500 Ω at room temperature). Inspect wiring for...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Uncontrolled motor runaway speed error E42; drive motor revs instantly to maximum RPM without speed ramping control.
On Bosch washers: Shorted motor control triac on power module, defective optocoupler gate...
Inspect motor tail shaft to ensure tachometer magnet is firmly threaded. Test motor triac...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Motor stalled / drum rotation mechanically locked E43; drive motor energized but drum cannot rotate.
On Bosch washers: Foreign object (bra underwire, coin, sock) jammed between inner drum and...
Disconnect mains. Rotate drum by hand to check for stiffness. Remove heating element to...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: No bidirectional motor rotation E44; drum only turns in one direction during wash tumble, reversing relay stuck.
On Bosch washers: Welded contacts or defective coil on motor reversing relay on power...
Inspect motor reversing relays on control board. Measure coil resistance of both reversing...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Motor inverter power module (IPM) overtemperature E47; thermal sensor on aluminum heatsink trips thermal shutdown.
On Bosch washers: Severe drum overload, high ambient temperature, dried thermal paste...
Allow inverter module to cool for 30 minutes. Reduce laundry load. Inspect aluminum...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Inverter DC bus undervoltage detected E48; rectified high-voltage DC rail drops below minimum threshold (< 200V DC).
On Bosch washers: Severe AC mains voltage dip, degraded DC bus bulk electrolytic...
Check mains voltage at wall socket under load (> 207V AC). Measure DC bus voltage across...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Inverter DC bus overvoltage detected E49; regenerated motor braking energy or AC mains surge exceeds safety limit (> 400V DC).
On Bosch washers: Heavy out-of-balance drum deceleration dumping excessive back-EMF, open...
Check mains line voltage. Measure braking dissipation circuit components on inverter board....
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: 3-phase BLDC motor drive hardware fault E50; inverter bridge reports phase current imbalance or shorted IGBT.
On Bosch washers: Shorted phase winding in permanent magnet brushless motor, damaged motor...
Disconnect motor plug. Measure 3-phase winding resistances between U-V, V-W, U-W (must be...
Bosch Serie 6 / Serie 8 / HomeProfessional AutoClean SelfCleaning Condenser: Motor inverter IPM short circuit E51; drive motor / compressor inverter trips instantly on overcurrent.
On Bosch tumble dryers: Shorted IGBT bridge transistor in inverter module, seized drum...
Disconnect mains. Measure 3-phase resistance of compressor and motor windings. Inspect...
Bosch Serie 6 / Serie 8 / HomeProfessional AutoClean SelfCleaning Condenser: Drum drive motor inverter undervoltage E52; DC bus supply voltage drops below minimum operating threshold (< 200V DC).
On Bosch tumble dryers: Dip in household AC supply voltage under motor load, weak...
Verify AC mains voltage at wall outlet under load (> 210V AC). Measure DC bus voltage on...
Bosch Serie 6 / Serie 8 / HomeProfessional AutoClean SelfCleaning Condenser: Drum drive motor inverter overvoltage E53; DC bus voltage exceeds upper safety limit (> 400V DC).
On Bosch tumble dryers: Energy feedback during sudden drum braking, AC mains power surge,...
Check mains voltage stability. Inspect motor braking circuit on inverter board. Ensure drum...
Bosch Serie 6 / Serie 8 / HomeProfessional AutoClean SelfCleaning Condenser: Heat pump compressor inverter phase imbalance E54; current asymmetry detected across compressor 3-phase motor.
On Bosch tumble dryers: Partial winding short circuit in hermetic compressor, loose...
Measure winding resistances between all 3 compressor pins (must be equal, ~12–18 Ω each)....
Bosch Serie 6 / Serie 8 / HomeProfessional AutoClean SelfCleaning Condenser: Compressor rotor locked / stalled E55; heat pump compressor fails to turn over, inverter trips on locked-rotor current.
On Bosch tumble dryers: Mechanical seizure of rotary compression scroll, high head pressure...
Allow system pressures to equalize for 1 hour. Clean all heat exchanger fins thoroughly. If...
Bosch Serie 6 / Serie 8 / HomeProfessional AutoClean SelfCleaning Condenser: Inverter heatsink thermal sensor overtemperature E56; power board temperature exceeds safe operating threshold (> 85°C).
On Bosch tumble dryers: Blocked cooling fan air vents in dryer base, heavy fluff...
Vacuum lower air vents and remove fluff from inverter board heatsink. Reapply silicone...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Inverter serial D-Bus communication lost E57; main control module loses serial data link to motor inverter module.
On Bosch washers: Broken or disconnected communication wiring harness between upper and...
Inspect 3-wire communication harness linking main PCB to inverter module. Verify 230V AC...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: 3D Hall acceleration sensor signal missing E59; tub motion sensor fails to report 3-axis vibration data during spin.
On Bosch washers: Loose or unplugged connector on 3D sensor mounted on outer tub, damaged...
Remove top lid. Inspect 3D sensor bolted to top edge of outer plastic tub. Verify 5V DC...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Flow sensor flow rate out of calibrated bounds E60; discrepancy between flowmeter pulse frequency and pressure rise.
On Bosch washers: Partially seized flow turbine wheel, partially blocked pressure switch...
Inspect inline flowmeter and clean turbine chamber. Clean pressure switch air trap and...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Abnormal door lock feedback signal E61; door interlock reports unexpected state changes during high-speed rotation.
On Bosch washers: Loose door hinge causing strike hook vibration, pitting on internal...
Tighten door hinge mounting screws on front panel. Check harness plug fit on door...
Bosch Serie 6 / Serie 8 / HomeProfessional AutoClean SelfCleaning Condenser: Microcontroller safety watchdog fault E63; internal microprocessor registers report execution error, halting cycle.
On Bosch tumble dryers: Mains electrical transients (switching spike from other equipment),...
Power off dryer for 5 minutes to discharge circuit capacitors. Inspect control module for...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Functional safety processor watchdog trip E63; internal CPU self-test parity or RAM execution error detected on main PCB.
On Bosch washers: Electrostatic discharge (ESD), corrupted EEPROM memory registers,...
Power down machine at mains for 5 minutes. Inspect power module for ruptured electrolytic...
Bosch Serie 4 / Serie 6 / Serie 8 / HomeProfessional EcoSilence Drive: Configuration variant coding error E67; EEPROM variant data mismatch between user interface and power module.
On Bosch washers: Unprogrammed replacement control board installed, corrupted model variant...
Access service mode to enter exact variant coding number from machine rating plate (E-Nr)....
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