mypros+
Error code reference

Thermador Range Error Code Er:04

WFR 2460 washer

Thermador codesThermador range codes

WFR 2460 washer: Door actuation defective.

MyPros+ Max

Get the full diagnostic procedure for Er:04.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What Er:04 means on a Thermador range

The Er:04 error code on a Thermador range equipped with the WFR 2460 washer system indicates a fault in the door actuation mechanism. This means the control system has detected that the door actuator is not operating correctly, either failing to engage, disengage, or complete its expected range of motion within the required timing parameters. The door actuator is a motorized or solenoid-driven component responsible for locking and releasing the door, and the control board monitors its feedback signal to confirm proper operation.

When the actuation cycle does not complete as expected, the system flags Er:04 to prevent the appliance from operating with an unsecured or improperly latched door. The root cause can lie in the actuator mechanism itself, the wiring harness connecting the actuator to the control board, or the door latch assembly that the actuator interfaces with. Mechanical obstructions, worn components, or electrical faults such as open circuits or shorts in the actuator circuit can all trigger this error.

Diagnosing this code requires inspecting the door latch assembly for physical damage or debris, checking the actuator for proper movement and electrical continuity, and verifying that the wiring harness connectors are fully seated and free of corrosion or damage. If the actuator motor or solenoid has failed internally, replacement of the actuator assembly will be necessary. Control board faults are a less common but possible cause if the actuator and wiring check out as functional.

Source: manufacturer service documentation.

Common causes of Er:04

  1. 01

    Faulty door actuator

    Part replacement

    The actuator motor or solenoid that physically moves the door latch may have failed internally, preventing it from completing its stroke. Testing the actuator for proper operation and electrical continuity will confirm this.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    The wiring between the door actuator and the control board may have a loose connector, broken wire, or corrosion causing an open or intermittent circuit. Inspect all connectors and harness segments in the actuator circuit.

  3. 03

    Mechanical obstruction in the door latch assembly

    Wiring / connection

    Debris, food buildup, or a physically damaged latch component can block the actuator from completing its range of motion. Inspect the latch area for obstructions and clean or repair as needed.

  4. 04

    Worn or broken door latch assembly

    Part replacement

    The latch mechanism that the actuator interfaces with may be worn, cracked, or broken, causing the actuator to move without achieving a proper lock or release. A physical inspection of the latch assembly will identify visible damage.

  5. 05

    Control board fault

    Part replacement

    If the actuator and all wiring check out correctly, the control board may not be sending or reading the actuator signal properly. This is a less common cause and is typically diagnosed after other components are ruled out.

See the test procedure for each cause

Frequently asked questions about Er:04

What does Er:04 mean on a Thermador range?
Er:04 on a Thermador range indicates a door actuation defect in the WFR 2460 washer system. The control board has detected that the door actuator failed to complete its expected locking or unlocking cycle. This can be caused by a failed actuator, wiring fault, mechanical obstruction, or a damaged latch assembly. The appliance will not operate normally until the fault is resolved.
Can I fix the Er:04 error myself?
Some causes of Er:04 can be addressed without professional help, such as clearing a mechanical obstruction from the door latch area or reseating a loose wiring connector. However, replacing the door actuator or latch assembly requires disassembly and comfort working with appliance components. If you are not confident in appliance repair work, a qualified technician is recommended.
Is it safe to use my Thermador range while Er:04 is displayed?
You should not continue using the range while Er:04 is active. The error indicates the door latching system is not functioning correctly, which could mean the door is not securing properly during operation. Using the appliance in this condition is not safe and could also cause further damage to the door mechanism or control system.
How much does it cost to repair the Er:04 error on a Thermador range?
Repair costs for Er:04 will vary depending on the failed component and whether you use a professional technician. A door actuator or latch assembly part typically ranges from around $50 to $200 or more depending on availability. Adding labor from a certified technician, total repair costs commonly fall in the range of $150 to $450. A diagnostic visit will help pinpoint the exact cause before committing to parts.
Will resetting my Thermador range clear the Er:04 error?
A power reset by unplugging the range or switching off the circuit breaker for a few minutes may temporarily clear the error code. However, if the underlying door actuation fault is still present, the code will return once the appliance attempts to operate the door mechanism again. A reset is useful for confirming whether the fault is intermittent, but it does not repair the root cause.

Related Thermador range codes

All Thermador range codes
View all 180 Thermador range codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass