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Error code reference

Thermador Range Error Code Er:16

WFR 2460 washer

Thermador codesThermador range codes

WFR 2460 washer: Safety level reached.

First step from the service manual

Start T/P 8 and 9 level test programme.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What Er:16 means on a Thermador range

Er:16 on a Thermador range equipped with the WFR 2460 washer system indicates that a safety water level threshold has been reached. This error is specific to the water-bearing washer subsystem integrated into certain Thermador range models, and it signals that water has accumulated to a point that triggers the unit's built-in protection logic. The control board monitors water level continuously, and when the sensor detects the safety limit has been exceeded, it halts normal operation and logs this fault to prevent potential overflow or appliance damage.

The primary diagnostic path specified for this fault is running the T/P 8 and 9 level test programme. These test routines allow a technician to evaluate the water level sensing system directly, isolating whether the fault originates from an actual excess water condition, a faulty water level sensor, a defective pressure switch, or a control board misreading the sensor signal. Running these tests will reveal whether the reported level corresponds to a real physical water accumulation or is a false trigger caused by a component failure in the sensing circuit.

Common contributors to this fault include a malfunctioning water inlet valve that fails to close fully, allowing water to continue entering the system beyond the set threshold. A blocked or kinked drain path can also cause water to back up and reach safety levels. Additionally, a defective water level pressure switch or sensor may report an incorrect high-level reading even when actual water volume is within normal range. Proper diagnosis requires completing the level test programme before replacing any components.

Source: manufacturer service documentation.

Common causes of Er:16

  1. 01

    Faulty water inlet valve not closing fully

    Part replacement

    If the water inlet valve fails to close completely, water continues entering the washer system and can reach the safety level threshold. Check for continuous water trickling into the unit even when it should be idle.

  2. 02

    Blocked or restricted drain path

    Wiring / connection

    A clogged or kinked drain hose prevents water from exiting the system properly, causing levels to build up until the safety limit is reached. Inspect the drain hose and pump for obstructions or kinks.

  3. 03

    Defective water level pressure switch or sensor

    Part replacement

    A failed pressure switch or level sensor can report a false high-water reading to the control board even when actual water volume is within safe limits. Running the T/P 8 and 9 level test programme will help confirm whether the sensor reading matches the actual water level.

  4. 04

    Control board misreading level sensor signal

    Part replacement

    A malfunctioning control board may incorrectly interpret the signal from an otherwise functional water level sensor, triggering the safety threshold fault. This is typically identified after sensor and mechanical components have been ruled out.

  5. 05

    Pressure tube blockage or air leak

    Wiring / connection

    The pressure tube connecting the water level sensor to the chamber can become blocked with debris or develop an air leak, causing inaccurate level readings that register as a safety level condition.

See the test procedure for each cause

Frequently asked questions about Er:16

What does Er:16 mean on a Thermador range?
Er:16 indicates that the WFR 2460 washer system integrated into the range has detected that the water level has reached its safety threshold. The appliance shuts down normal operation when this occurs to prevent overflow or water damage. Diagnosis requires running the T/P 8 and 9 level test programme to determine whether the elevated level is real or caused by a faulty sensor.
Can I fix Er:16 on my Thermador range myself?
Some basic checks such as inspecting the drain hose for kinks or blockages are within reach of a knowledgeable DIYer. However, the primary diagnostic step requires running specific internal test programmes (T/P 8 and 9) that typically require service-level access to the control interface. For anything beyond visual drain inspection, a qualified appliance technician is recommended.
Is Er:16 on a Thermador range a safety hazard?
Yes, this error is treated as a safety condition by the appliance itself because excess water accumulation can lead to overflow, water damage to surrounding cabinetry, or electrical hazards. The unit is designed to halt operation when this threshold is reached. Do not attempt to bypass the fault or continue running the appliance until the root cause has been diagnosed and corrected.
Will resetting the Thermador range clear the Er:16 error?
A simple power reset may temporarily clear the fault code from the display, but it will not resolve the underlying cause. If the water level sensor, inlet valve, or drain system has a fault, the error will return during the next operating cycle. A proper repair requires running the T/P 8 and 9 level test programme to identify and correct the root issue.
How much does it cost to repair the Er:16 error on a Thermador range?
Repair costs vary depending on the cause. Clearing a blocked drain hose is a low-cost repair, often falling in the range of $75 to $150 for a service call. Replacing a faulty water inlet valve or pressure switch typically costs between $150 and $350 including parts and labor. Control board replacement, if required, can range from $300 to $600 or more depending on part availability.

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