Novomatic AL17

Novomatic error code AL17 indicates: Novomatic GS / GSU Integrated & Freestanding Electronic Dishwasher Series: Diagnostic fault code AL17 registered by the microcomputer controller. Heater power relay on control board defective; contacts fail to switch or remain stuck.

The primary root cause for Novomatic code AL17 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: relay coil open circuit, solder joint cracked by thermal cycling, or contact points burned. Metrological tolerance verification: relay coil resistance 360-440 Ω at 12 VDC; switched contacts open > 1 MΩ, closed < 0.1 Ω..

To resolve error code AL17: Disconnect mains power before servicing. Unplug the harness at the main PCB and use a calibrated digital multimeter: inspect PCB rear solder pads under magnifying loupe for annular solder ring cracks, resolder pads or replace 12V DC power relay. 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 AL17 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: relay coil open circuit, solder joint cracked by thermal cycling, or contact points burned. Metrological tolerance verification: relay coil resistance 360-440 Ω at 12 VDC; switched contacts open > 1 MΩ, closed < 0.1 Ω. 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.