Novomatic AL13

Novomatic error code AL13 indicates: Novomatic GS / GSU Integrated & Freestanding Electronic Dishwasher Series: Diagnostic fault code AL13 registered by the microcomputer controller. Sump thermal safety limiter thermostat tripped or open circuit detected.

The primary root cause for Novomatic code AL13 is: On Novomatic Austrian and Central European retail OEM chassis appliances engineered with Austrian retail OEM wash system with 1800W flow tube element (27-31 Ω), wash motor (95-125 Ω), and pressure membrane switch: dry heating due to pump failure, bimetal disc fatigue, or wash pump aeration cavitating. Metrological tolerance verification: bimetal thermal limiter contact < 0.2 Ω closed; opens at 85°C ±5°C; resets manually or at 60°C..

To resolve error code AL13: Disconnect mains power before servicing. Unplug the harness at the main PCB and use a calibrated digital multimeter: measure continuity across safety thermostat terminals expecting < 0.2 Ω; reset red button if manual type. Inspect contacts for pin oxidation or loose terminals. Replace defective part if out of tolerance, re-energize and clear error: press and hold the Program selector and Start buttons together for 5 seconds until the display beeps and drain pump evacuates remaining water.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Novomatic code AL13 persists, the physical component causing On Novomatic Austrian and Central European retail OEM chassis appliances engineered with Austrian retail OEM wash system with 1800W flow tube element (27-31 Ω), wash motor (95-125 Ω), and pressure membrane switch: dry heating due to pump failure, bimetal disc fatigue, or wash pump aeration cavitating. Metrological tolerance verification: bimetal thermal limiter contact < 0.2 Ω closed; opens at 85°C ±5°C; resets manually or at 60°C. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test Mechanical Pressure Switch Contacts / Inductive Frequency Sensor across Across switch spade contacts with harness unplugged; electronic output: 40Hz–50Hz frequency signal. Expected nominal reading is Mechanical: Continuity 0.0Ω–0.2Ω (Empty: 11-12, Full: 11-14). Electronic: 20Ω–45Ω coil resistance.. Tolerance: Mechanical switch contacts must transition cleanly on gentle breath pressure. Coil ~22Ω ±5%..

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.