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Castor • Central Diagnostic Dictionary

191 Verified Codes in Database

Castor Error Codes & Diagnostics

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

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

CodeAppliancesFault / DiagnosticsRepair InstructionsAction

EF2

Washing Machine

General System & Mechanical Integration

Castor CWF Series / Master Lavatrice Front Load Washer: Detergent overdosing / excessive foam warning EF2; foam layer prevents drum spin acceleration.

On Castor (Castor CWF Series / Master Lavatrice Front Load Washer) models: Too much high-sudsing detergent used, hand-washing detergent accidentally added, or low water hardness requiring reduced dosage.

Cancel cycle and run cold rinse programme without detergent. Reduce powder or liquid detergent dosage in future wash loads. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

EF3

Washing Machine

Drainage System & Drain Pump

Castor CWF Series / Master Lavatrice Front Load Washer: AquaControl anti-flood protection active EF3; float switch triggered in base pan with continuous safety drain.

On Castor (Castor CWF Series / Master Lavatrice Front Load Washer) models: Water leak from tub hose, split door bellow gasket, leaking water inlet valve, or drain pump housing crack accumulating water in base.

Disconnect power and shut water tap. Tilt machine backward 45° to drain base tray onto towels. Locate leak source and replace leaking component. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

EF4

Washing Machine

Water Inlet Valve, Aquastop & Flowmeter

Castor CWF Series / Master Lavatrice Front Load Washer: Low water inlet pressure warning EF4; flowmeter pulses detected but intake flow rate is below 5 L/min.

On Castor (Castor CWF Series / Master Lavatrice Front Load Washer) models: Partially closed water supply tap, encrusted limescale in flowmeter impeller, clogged inlet hose mesh, or low municipal water pressure.

Open household water tap fully. Unscrew inlet hose and clean mesh filter under running water. Verify flow rate of at least 8 L/min into bucket. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

EF5

Washing Machine

General System & Mechanical Integration

Castor CWF Series / Master Lavatrice Front Load Washer: Unbalanced load spin abort warning EF5; high drum eccentricity prevents safe spin acceleration.

On Castor (Castor CWF Series / Master Lavatrice Front Load Washer) models: Single heavy item (bath mat, heavy towel, bathrobe) washed alone, balled-up duvet cover trapping smaller clothes, or worn shock absorbers.

Pause machine, open door, and redistribute laundry evenly around drum perimeter. Add two medium towels to balance single heavy items. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

EH0

Tumble Dryer

General System & Mechanical Integration

Castor CDE Series / Secca Rapido Condenser Dryer: Electrical mains supply out of limits EH0; appliance pauses cycle to protect electronic components from electrical instability.

On Castor (Castor CDE Series / Secca Rapido Condenser Dryer) models: Mains voltage dropped below 185V AC or surged above 265V AC, mains frequency unstable (outside 50Hz/60Hz ±1Hz), or loose neutral connection at wall socket.

Measure line-to-neutral AC voltage with true-RMS multimeter (expected 220–240V AC). Inspect wall socket connections and check for shared extension cords. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

EH0

Washing Machine

Electronic Control Board (PCB) & Bus Communications

Castor CWF Series / Master Lavatrice Front Load Washer: Mains power supply out of specification alarm EH0; generic electrical supply anomaly detected.

On Castor (Castor CWF Series / Master Lavatrice Front Load Washer) models: Combined voltage and frequency anomaly, defective zero-crossing detector on main PCB, or burned connections at terminal block.

Inspect mains terminal block behind machine for melted plastic. Check 230V AC supply stability and clean EMI line filter connections. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

EH1

Washing Machine

Drive Motor, Inverter & Tachometer Sensor

Castor CWF Series / Master Lavatrice Front Load Washer: Mains electrical frequency out of range EH1; frequency is outside the 43 Hz to 67 Hz window.

On Castor (Castor CWF Series / Master Lavatrice Front Load Washer) models: Operation on uncalibrated portable generator or off-grid solar inverter, severe electrical grid harmonic distortion, or failing PCB timer clock.

Measure electrical frequency with multimeter frequency mode (must be 50.0 Hz ± 0.5 Hz). Avoid operating machine from non-sinusoidal generators. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

EH2

Washing Machine

General System & Mechanical Integration

Castor CWF Series / Master Lavatrice Front Load Washer: Mains supply overvoltage alarm EH2; mains electrical supply exceeds 275V RMS.

On Castor (Castor CWF Series / Master Lavatrice Front Load Washer) models: Lightning strike on local grid, loss of neutral in three-phase building distribution causing 400V phase shift, or transient power surges.

Unplug washing machine immediately to prevent board destruction. Have an electrician test mains voltage (must not exceed 253V AC maximum). Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

EH3

Washing Machine

General System & Mechanical Integration

Castor CWF Series / Master Lavatrice Front Load Washer: Mains supply undervoltage alarm EH3; electrical supply voltage drops below 175V RMS.

On Castor (Castor CWF Series / Master Lavatrice Front Load Washer) models: Heavy electrical overload on home circuits, degraded service drop lines from utility company, or resistive connection in wall outlet.

Measure voltage at wall outlet during wash cycle startup. If below 200V AC, contact electrical utility or inspect home circuit breaker. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F

Hob / Cooktop

General System & Mechanical Integration

Castor CIE Series / Piano Cottura Induzione Cooktop: Pan detection symbol F flashing; cooking zone cannot detect magnetic cookware or pan diameter is too small.

On Castor (Castor CIE Series / Piano Cottura Induzione Cooktop) models: Cookware made of non-ferrous material (copper, glass, pure aluminium), pan base deformed and lifted away from glass, or pan placed off-center.

Test base of cookware with permanent magnet (must attract firmly). Ensure cookware base covers at least 70% of zone cross-hairs markings. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F1

Refrigerator / Freezer

NTC Temperature Sensor & Thermistor

Castor CRB Series / Frigo Ventilato Refrigerator-Freezer: Fresh food compartment air sensor failure F1; refrigerator compartment temperature regulation becomes erratic.

On Castor (Castor CRB Series / Frigo Ventilato Refrigerator-Freezer) models: Refrigerator compartment NTC thermistor open or short circuit (~2.5 kΩ or ~5.0 kΩ at 25°C depending on platform), or moisture on sensor connector.

Locate air sensor inside fresh food compartment. Measure resistance with multimeter (typically ~2.5 kΩ at 25°C, rising to ~5.9 kΩ at 4°C). Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F2

Refrigerator / Freezer

Refrigeration Compressor, Defrost Heater & PTC Relay

Castor CRB Series / Frigo Ventilato Refrigerator-Freezer: Evaporator coil sensor failure F2; automatic defrost termination monitoring fails, risking ice accumulation on coil.

On Castor (Castor CRB Series / Frigo Ventilato Refrigerator-Freezer) models: Evaporator clip-on NTC probe defective or dislodged from refrigerant return bend, water ingress freezing inside probe sleeve, or open wire.

Remove rear freezer panel. Test evaporator NTC resistance (typically ~2.5 kΩ at 25°C, rising to ~16.3 kΩ at -18°C). Clip firmly to copper return pipe. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F3

Refrigerator / Freezer

NTC Temperature Sensor & Thermistor

Castor CRB Series / Frigo Ventilato Refrigerator-Freezer: Ambient room temperature sensor error F3; external climate class compensation calculation disabled.

On Castor (Castor CRB Series / Frigo Ventilato Refrigerator-Freezer) models: Ambient NTC thermistor inside top hinge cover or display module open/shorted, or severed wire pinched by refrigerator door upper hinge.

Remove top hinge plastic cover. Inspect ambient NTC sensor and harness. Measure resistance (~2.5 kΩ or ~5.0 kΩ at 25°C room temperature). Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F4

Refrigerator / Freezer

NTC Temperature Sensor & Thermistor

Castor CRB Series / Frigo Ventilato Refrigerator-Freezer: Freezer compartment temperature sensor failure F4; freezer cooling runs in continuous emergency backup mode.

On Castor (Castor CRB Series / Frigo Ventilato Refrigerator-Freezer) models: Freezer air NTC sensor open circuit or damaged by frozen condensation, broken wire behind freezer inner liner, or corrupted ADC input on motherboard.

Access freezer air sensor probe. Test resistance with ohmmeter: ~2.5 kΩ at 25°C, increasing to ~16.3 kΩ at -18°C. Replace sensor probe if out of spec. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F5

Refrigerator / Freezer

Refrigeration Compressor, Defrost Heater & PTC Relay

Castor CRB Series / Frigo Ventilato Refrigerator-Freezer: Defrost heater circuit failure F5; electric defrost heater fails to energize, causing frost to clog evaporator fins.

On Castor (Castor CRB Series / Frigo Ventilato Refrigerator-Freezer) models: Open glass calrod/metal defrost heating element (nominal 200–350W, ~150–260 Ω), blown thermal fuse in series (72°C or 77°C), or burnt defrost relay on PCB.

Access bottom of evaporator. Disconnect defrost element and measure resistance (~150–260 Ω). Test thermal fuse continuity with ohmmeter (< 0.5 Ω). Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F6

Refrigerator / Freezer

Refrigeration Compressor, Defrost Heater & PTC Relay

Castor CRB Series / Frigo Ventilato Refrigerator-Freezer: Inverter compressor driver fault F6; BLDC compressor fails to start or inverter trips due to over-current.

On Castor (Castor CRB Series / Frigo Ventilato Refrigerator-Freezer) models: Seized compressor piston mechanism, open winding in 3-phase BLDC stator (~6–15 Ω between all terminal pairs), or blown power transistors on inverter board.

Measure resistance across all 3 compressor pins with ohmmeter (must be equal: ~6–15 Ω). Measure PWM frequency signal from main PCB to inverter board. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F7

Refrigerator / Freezer

Refrigeration Compressor, Defrost Heater & PTC Relay

Castor CRB Series / Frigo Ventilato Refrigerator-Freezer: Evaporator fan motor malfunction F7; fan motor blocked by ice or hall feedback pulse missing, starving airflow.

On Castor (Castor CRB Series / Frigo Ventilato Refrigerator-Freezer) models: Ice accumulation freezing the fan blades, defective 12V DC brushless motor windings, severed connector lead, or blown fan driver IC on main motherboard.

Manually spin fan blade to check for ice obstruction. Measure 12V DC supply to fan terminals with multimeter during test mode. Replace fan if seized. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F101

Oven / Microwave

Drive Motor, Inverter & Tachometer Sensor

Castor COB Series / Forno Multifunzione Oven: Door lock motorized latch error F101; oven door fails to lock automatically during pyrolytic cleaning initiation.

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Defective door lock synchronous gear motor (coil resistance ~2.0–2.8 kΩ), stuck cam mechanism, broken microswitch contact, or warped door hinge preventing flush seal.

Disconnect oven from mains. Access top latch assembly. Measure lock motor coil resistance (2.0–2.8 kΩ). Verify microswitch continuity with door closed (< 1 Ω). Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F102

Oven / Microwave

Drive Motor, Inverter & Tachometer Sensor

Castor COB Series / Forno Multifunzione Oven: Door unlock timeout F102; pyrolytic latch remains engaged even after cavity temperature drops below safe threshold (300°C).

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Latching cam stuck in locked position, burnt triac on motherboard driving lock motor, or misaligned unlock feedback microswitch.

Check for mechanical jamming in linkage. Test microswitch 2 (normally open, switches to < 1 Ω when unlocked). Verify 230V drive pulse from control board. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F103

Oven / Microwave

Drive Motor, Inverter & Tachometer Sensor

Castor COB Series / Forno Multifunzione Oven: Tangential cooling fan speed error F103; cooling blower fails to rotate or tacho pulse frequency is too low.

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Tangential fan motor winding open (nominal 150–220 Ω), foreign debris stopping blower blades, loose hall effect sensor connector, or blown fan triac.

Isolate oven from power and inspect fan blades for free rotation. Measure motor winding resistance (150–220 Ω). Verify 5V DC supply to hall sensor. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F104

Oven / Microwave

Electronic Control Board (PCB) & Bus Communications

Castor COB Series / Forno Multifunzione Oven: Electronic control board over-temperature F104; thermal sensor on main PCB measures excessive temperature (> 85°C).

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Cooling fan failure during extended high-temperature bake or pyrolytic cycle, blocked top ventilation slits in cabinet, or deteriorated cavity insulation.

Check kitchen installation clearances (minimum 50mm rear air gap). Ensure cabinet vents are clear of obstructions. Verify cooling blower operation. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F105

Oven / Microwave

NTC Temperature Sensor & Thermistor

Castor COB Series / Forno Multifunzione Oven: Food meat probe circuit error F105; internal temperature sensing probe jack shorted, open, or reading abnormal resistance.

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Grease or moisture penetration inside probe cavity jack, damaged silicone cable on meat probe needle, or open PT1000 sensor inside probe tip (~1079 Ω at 20°C).

Unplug meat probe from cavity socket. Clean socket contacts with isopropyl alcohol. Measure probe resistance across plug pins with multimeter (~1079 Ω at 20°C). Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F106

Oven / Microwave

Heating Element, Thermostat & Safety Fuse

Castor COB Series / Forno Multifunzione Oven: Heating safety relay welded F106; main PCB detects continuity through heating element relay contacts when deactivated.

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Electrical arcing welded the 16A relay contacts on the power PCB, or transient voltage spike degraded the relay coil switching driver.

Disconnect oven mains immediately. Inspect relay contacts on power PCB with ohmmeter (must read ∞ Ω open circuit when unpowered). Replace PCB or relay. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F107

Oven / Microwave

Electronic Control Board (PCB) & Bus Communications

Castor COB Series / Forno Multifunzione Oven: Internal communication link error F107; display module loses serial data exchange with the main power control board.

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Oxidized or unlatched edge connectors on multi-core ribbon cable, loss of 12V DC power bus supply, or firmware transmission parity errors.

Inspect connecting ribbon cable between UI display and power PCB. Re-seat connectors and check continuity (< 1 Ω). Verify 12V DC and 5V DC voltages. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F108

Oven / Microwave

Heating Element, Thermostat & Safety Fuse

Castor COB Series / Forno Multifunzione Oven: Electrical mains frequency error F108; the clock oscillator detects power line frequency outside 50Hz / 60Hz limits.

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Emergency backup generator supply with dirty sine wave, extreme voltage harmonic distortion from heavy loads, or zero-cross detection resistor damaged on PCB.

Measure line frequency with digital multimeter (must be steady 50.0 Hz or 60.0 Hz ±0.5 Hz). Ensure oven is connected to pure utility grid supply. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F109

Oven / Microwave

NTC Temperature Sensor & Thermistor

Castor COB Series / Forno Multifunzione Oven: Cavity temperature sensor fault F109; electronic board detects open circuit or shorted PT500 / PT1000 temperature sensor.

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Open platinum thermal sensor element in oven back wall (nominal ~540 Ω for PT500 or ~1080 Ω for PT1000 at 20°C), broken wiring lead, or pinched heat-resistant cable.

Disconnect oven mains. Access rear panel cavity sensor harness. Measure resistance with multimeter (PT500 reads ~540 Ω at 20°C; PT1000 reads ~1080 Ω at 20°C). Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F110

Oven / Microwave

Drive Motor, Inverter & Tachometer Sensor

Castor COB Series / Forno Multifunzione Oven: Door lock position mismatch F110; microswitch sensing signals conflict with commanded lock motor position.

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Bent microswitch operating arm on lock assembly, cracked cam profile, or loose harness wires swapping position 1 and position 2 feedback lines.

Inspect door lock assembly on top frame. Manually actuate lock cam to verify microswitch contacts toggle cleanly between 0 Ω and ∞ Ω. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F111

Oven / Microwave

Heating Element, Thermostat & Safety Fuse

Castor COB Series / Forno Multifunzione Oven: Heating rise timeout F111; oven temperature fails to increase by at least 15°C within 15 minutes of heating initiation.

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Open circular fan-forced heating element (~28–32 Ω, ~2000W), open bottom heating element (~40–48 Ω, ~1000W), tripped manual Klixon safety stat, or open relay coil.

Disconnect oven power and remove rear access shield. Measure resistance of circular (~30 Ω), top grill (~22 Ω), and bottom (~44 Ω) heating elements. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

F112

Oven / Microwave

Electronic Control Board (PCB) & Bus Communications

Castor COB Series / Forno Multifunzione Oven: Appliance EEPROM configuration error F112; non-volatile memory parameters corrupted or unconfigured replacement module.

On Castor (Castor COB Series / Forno Multifunzione Oven) models: Power failure or voltage spike during program write cycle, aged memory chip corruption, or blank spare control board installed without PNC coding.

Power cycle oven for 10 minutes. If error persists, enter diagnostic technician menu and re-program configuration code matching model PNC on rating plate. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

i5A

Dishwasher

Drive Motor, Inverter & Tachometer Sensor

Castor CDF Series / Lavastoviglie Silenziosa Dishwasher: Circulation pump inverter heat sink thermal threshold reached i5A; power module de-rates or shuts down.

On Castor (Castor CDF Series / Lavastoviglie Silenziosa Dishwasher) models: Restricted airflow in bottom machinery compartment, sound deadening felt blanket shifted over inverter board, or high ambient heat.

Reposition sound insulation felt to ensure clear airflow channels around inverter heatsink. Clear dust from bottom chassis louvers. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

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Castor — Complete Error Code Catalog

167 Verified Error Codes

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

Dishwasher45

AL5 AL6 C1 C2 C3 i5A i5B i5C i5D i5E i5F i10 i11 i20 i22 i23 i24 i30 i40 i41 i43 i44 i50 i51 i52 i53 i54 i55 i56 i57 i58 i59 i60 i61 i63 i64 i70 i80 i90 iA0 iB0 iC0 iD0 iF0 iF1

Washing Machine57

C9 CF E3A E5A E5C E5D E5E E5F E5H E6H E9C E9E E10 E11 E12 E13 E20 E21 E22 E23 E24 E25 E33 E34 E35 E38 E40 E41 E42 E43 E44 E45 E66 E68 E69 E74 E82 E83 E84 E85 E94 E95 E97 E98 EA0 EA1 EA6 EB0 EF0 EF1 EF2 EF3 EF4 EF5 EH1 EH2 EH3

Tumble Dryer25

E30 E31 E32 E50 E51 E52 E53 E54 E57 E58 E59 E60 E61 E62 E63 E70 E71 E72 E73 E80 E90 E91 E92 E93 EH0

Oven / Microwave12

F101 F102 F103 F104 F105 F106 F107 F108 F109 F110 F111 F112

Hob / Cooktop12

E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA F

Refrigerator / Freezer16

E01 E02 E03 E04 E05 E06 E07 F1 F2 F3 F4 F5 F6 F7 SY EF 5Y EF

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