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OEM VERIFIED BENCH
OFFICIAL FAULT CODEAL03
Novomatic
Novomatic // OFFICIAL DIAGNOSTIC BENCH

Novomatic AL03

DishwasherDrainage System & Drain Pump
Premium built-in dishwasher with open illuminated stainless steel interior and precision spray arms
Dishwasher
Other Brands Sharing Code AL03:BauknechtAL03HooverAL03ZanussiAL03De DietrichAL03GaggenauAL03SchulthessAL03FAGORAL03RosieresAL03AtlanticAL03IgnisAL03

Symptom / Description

FAULT

Cycle finishes with dirty water left in the bottom of the dishwasher.

TELEMETRY // LIVESIG: FAULT_DETECTED

Root Cause

ROOT CAUSE

The dishwasher has failed to drain the water due to a blockage in the filter, drain pump, or drain hose.

CIRCUIT // SUBSYSTEMLOGIC: ROOT_ISOLATED

Repair Instructions

UNLOCKED
1Remove and clean the main filter and microfilter. Check the drain pump impeller for obstructions. Ensure the drain hose is not kinked or clogged.
AI diagnostic workshop engine analyzing appliance circuit schematics and error telemetry in real time
AI WORKSHOP PROTOCOL ENGINE
Direct extraction from OEM factory manuals & wiring schematics

Field Actions

DISPATCH
Need Help? Call a Certified TechnicianWorldwide Novomatic Parts Finder
Electrical & Safety Protocol

Always disconnect appliance from 230V/400V mains before opening panels. Use CAT III multimeter for circuit testing.

CALIBRATED BENCH PROTOCOL // CAT III 600V

Workshop Verification & Safety Checklist

WORKSHOP VERIFICATION PROTOCOLDrainage System & Drain PumpDishwasher
2. Multimeter & Electrical Bench Tests (Ω)
MODE: OHMMETER (Ω)AUTO-RANGE
Precision digital multimeter probes measuring electrical resistance in Ohms on an appliance control board
CALIBRATED METROLOGY RESISTANCE BENCH (CAT III)
Nominal Resistance (Ω)
160Ω–220Ω (Sync 230V) / 20Ω–45Ω (3-Phase BLDC)NOMINAL
0 Ω (SHORT)CALIBRATED BAND∞ OL (OPEN)
▲ NOMINAL OPERATING WINDOW
Target Component:Drain Pump Motor Stator Coils
Test Pins & Connections
PROBE (+)
PROBE (-)
Across pump motor spade terminals (L-N unclipped)
Tolerance & Diagnostic Criteria±10% balance. Insulation resistance between coil and motor chassis must exceed 20MΩ.
1. Pre-Intervention Electrical Safety Protocols
  • !Electrical Safety Protocol: Isolate 230V mains power before accessing the lower pump housing.
  • !Prepare a shallow basin and absorption towels: expect 3 to 10 liters of stagnant trapped water upon filter opening.
  • !Beware of sharp foreign objects (broken glass, needles, screws) trapped inside the impeller cavity.
3. Preliminary Mechanical & Visual Checks
  • Unscrew coin trap filter and clear all foreign debris (coins, hairpins, bra underwires).
  • Rotate pump impeller manually: synchronous magnetic rotors should snap cleanly in 90° intervals without jamming.
  • Check drain hose for kinks, blockages, or unpunched sink spigots; verify drain height is between 65cm and 100cm.
Perform these diagnostic steps before triggering AI Deep Search or replacing boards.Certified Workshop Routine

Frequently Asked Questions: Novomatic AL03

FAQ TREE
What does error code AL03 mean on a Novomatic appliance?

Novomatic error code AL03 indicates: Cycle finishes with dirty water left in the bottom of the dishwasher..

What is the root cause of Novomatic error code AL03?

The primary root cause for Novomatic code AL03 is: The dishwasher has failed to drain the water due to a blockage in the filter, drain pump, or drain hose..

How do I fix or resolve Novomatic error code AL03?

To resolve error code AL03: Remove and clean the main filter and microfilter. Check the drain pump impeller for obstructions. Ensure the drain hose is not kinked or clogged.

Is it safe to clear Novomatic error code AL03 by resetting power?

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Novomatic code AL03 persists, the physical component causing The dishwasher has failed to drain the water due to a blockage in the filter, drain pump, or drain hose. must be inspected or replaced.

How do I test electrical resistance for Novomatic code AL03 using a multimeter?

Set a digital multimeter to ohms (Ω). Disconnect power and test Drain Pump Motor Stator Coils across Across pump motor spade terminals (L-N unclipped). Expected nominal reading is 160Ω–220Ω (Sync 230V) / 20Ω–45Ω (3-Phase BLDC). Tolerance: ±10% balance. Insulation resistance between coil and motor chassis must exceed 20MΩ..

What safety protocol must be followed before servicing Novomatic code AL03?

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.

Community Verification

COMMUNITY

Did this solution resolve the issue?

SEMANTIC KNOWLEDGE GRAPH // NOVOMATIC

Related Novomatic Dishwasher Error Codes

Diagnostic Link Mesh14 OEM Cross-References

Cross-referenced diagnostic codes for technicians inspecting similar component subsystems.

AL05Water Level Pressure Switch & Air Dome
Dishes remain dirty after a full cycle.
Inspect Protocol
AL10Heating Element, Thermostat & Safety Fuse
Dishes are not drying properly and the cycle finishes with cold water.
Inspect Protocol
F01NTC Temperature Sensor & Thermistor
Oven is not heating correctly or shows an inaccurate temperature.
Inspect Protocol
F02Heating Element, Thermostat & Safety Fuse
Oven is overheating and may display a very high temperature.
Inspect Protocol
F03NTC Temperature Sensor & Thermistor
Water does not heat, or wash cycle takes excessively long.
Inspect Protocol
F04Electronic Control Board (PCB) & Bus Communications
Oven controls are unresponsive or the display is erratic.
Inspect Protocol
F05Drive Motor, Inverter & Tachometer Sensor
Oven door remains locked after a self-cleaning cycle.
Inspect Protocol
F08Water Level Pressure Switch & Air Dome
Machine stops mid-cycle, especially during heating.
Inspect Protocol
F09Electronic Control Board (PCB) & Bus Communications
Appliance is dead, or lights are flashing erratically with no response.
Inspect Protocol
F11Drainage System & Drain Pump
Machine fails to drain the water.
Inspect Protocol
F12Electronic Control Board (PCB) & Bus Communications
Machine is unresponsive, display may be blank or flashing all lights.
Inspect Protocol
F17Door Lock Mechanism & Safety Interlock
The door will not lock, and the cycle refuses to start.
Inspect Protocol
F3NTC Temperature Sensor & Thermistor
Freezer temperature is incorrect or fluctuating widely.
Inspect Protocol
F7Refrigeration Compressor, Defrost Heater & PTC Relay
Heavy frost and ice buildup inside a frost-free freezer.
Inspect Protocol
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