Miele F4158

Miele error code F4158 indicates: The program is interrupted because the device detects an inconsistent water level signal..

The primary root cause for Miele code F4158 is: Level pressure switch 1B1/13 has closed its contact 1-2, indicating that the normal wash water level has been reached. The error occurs if this signal is received at an inappropriate time in the cycle..

To resolve error code F4158: 1. Turn off the device. 2. Inspect the 1B1/13 pressure switch and its tube for obstruction or damage. 3. Check the wiring between the pressure switch and the control module. 4. Test the functionality of contact 1-2 of the pressure switch. 5. Replace the component if its operation is erratic.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Miele code F4158 persists, the physical component causing Level pressure switch 1B1/13 has closed its contact 1-2, indicating that the normal wash water level has been reached. The error occurs if this signal is received at an inappropriate time in the cycle. 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.