Thermador Range Error Code Er:18

Er:18 means the WFR 2460 wash system's pressure sensor could not complete its calibration process. The pressure sensor monitors water levels in the wash compartment, and when the control board cannot establish a valid calibration baseline from the sensor, it logs this code and halts operation. The issue can be mechanical, such as a blocked pressure hose, or electronic, such as a failed sensor or wiring fault.

A simple power reset will typically clear the displayed code temporarily, but Er:18 will return if the underlying calibration failure has not been resolved. Because the error is triggered during a calibration routine, the system will attempt calibration again on the next cycle and log the fault again if the root cause, such as a blocked hose or faulty sensor, is still present. A proper repair is required for the code to stay cleared.

Repair costs vary depending on the root cause. If the fix involves clearing a blocked pressure hose or reseating a wiring connector, labor costs alone may range from roughly $100 to $200. If a new pressure sensor is required, parts and labor combined typically fall in the range of $150 to $400. A main control board replacement, if needed, is the most expensive scenario and can bring total costs to $400 to $800 or more depending on parts availability and technician rates.

The correct first step is to run the T/P 8 level test programme, which exercises the pressure sensor circuit and reveals how the sensor is responding across different water levels. This test helps narrow the problem down to either the pressure hose and chamber, the sensor itself, or the control board. After reviewing the test results, inspect the pressure hose for kinks, blockages, or moisture before moving on to sensor or board testing.

The Er:18 code indicates the wash system cannot reliably measure water levels, which means the appliance cannot safely regulate the water fill cycle in the WFR 2460 compartment. Continuing to operate the wash function with this fault active risks an uncontrolled fill condition. Basic cooking functions unrelated to the wash system may be unaffected, but the wash system should not be used until the fault is resolved.