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Error code reference

Electrolux Dryer Error Code E42

Sensing circuit of the door opening solenoid supply triac defective.

Electrolux codesElectrolux dryer codes

Sensing circuit of the door opening solenoid supply triac defective.

First step from the service manual

Replace main electronics board.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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What E42 means on a Electrolux dryer

The E42 error code on an Electrolux dryer indicates that the sensing circuit monitoring the door opening solenoid supply triac has detected a fault. The triac is a solid-state switching component on the main electronics board responsible for controlling power delivery to the door opening solenoid. When the board's internal sensing circuit checks the triac's status and detects an abnormal condition, such as a short circuit, open circuit, or incorrect signal feedback from that switching element, the control system logs E42 and halts normal operation to prevent further damage.

The door opening solenoid is part of the mechanism that releases or actuates the dryer door latch system. The triac that supplies current to this solenoid is directly integrated into the main electronics board circuitry. Because the fault is specifically within the sensing circuit of the triac rather than necessarily the solenoid itself, the problem is almost always internal to the board. A failed triac junction, damaged gate circuit, or compromised feedback trace on the PCB can all produce this error. External wiring issues between the board and the solenoid could theoretically contribute, but the diagnostic path points primarily to the board itself.

Because the triac and its associated sensing circuit are not field-repairable components, the recommended first diagnostic step is replacement of the main electronics board. Attempting to test the triac in isolation requires advanced electronics diagnostic equipment and expertise. If the wiring harness connecting the board to the door solenoid shows visible damage, burning, or loose connectors, those conditions should be inspected and corrected before or alongside the board replacement to rule out recurring faults.

Source: manufacturer service documentation.

Common causes of E42

  1. 01

    Failed door solenoid supply triac on the main board

    Part replacement

    The triac responsible for supplying power to the door solenoid has shorted or opened internally. This is the most common root cause of E42 and is located directly on the main electronics board, making board replacement the standard repair.

  2. 02

    Damaged triac sensing circuit on the PCB

    Part replacement

    The feedback or sensing trace associated with the triac may be burnt, cracked, or otherwise compromised. This is an internal PCB fault that cannot be repaired in the field and requires full board replacement.

  3. 03

    Damaged wiring harness to the door solenoid

    Wiring / connection

    A shorted, burnt, or disconnected wire between the main board and the door opening solenoid can create abnormal electrical conditions that the sensing circuit interprets as a triac fault. Inspect the harness connectors and wire insulation for visible damage before replacing the board.

  4. 04

    Faulty door opening solenoid

    Part replacement

    A solenoid that has internally shorted can place an unexpected load on the supply triac, potentially triggering the sensing circuit fault. Checking the solenoid for continuity and correct resistance may help identify this as a contributing factor.

See the test procedure for each cause

Frequently asked questions about E42

What does E42 mean on a Electrolux dryer?
E42 on an Electrolux dryer means the sensing circuit monitoring the door opening solenoid supply triac has detected a defect. The triac is a solid-state switching component on the main electronics board that controls power to the door solenoid. This is a board-level fault, and the primary recommended repair is replacement of the main electronics board.
Can I fix E42 on my Electrolux dryer myself?
Resolving E42 typically requires replacing the main electronics board, which is a moderately advanced repair. A knowledgeable DIYer comfortable with appliance disassembly and electrical components can perform the replacement, but diagnosing the triac circuit itself requires specialized electronics testing equipment. Before replacing the board, it is worth inspecting the wiring harness to the door solenoid for visible damage.
Will resetting my Electrolux dryer clear the E42 error?
A power cycle reset is unlikely to permanently clear E42 because the fault is tied to a defective hardware component, specifically the triac sensing circuit on the main board. The error may temporarily disappear after a reset, but it will return once the dryer attempts to activate the door solenoid circuit. A proper repair addressing the defective component is required for a lasting fix.
Is it safe to use my Electrolux dryer while it shows E42?
Operating the dryer while E42 is active is not recommended. The error indicates a fault in the circuit controlling the door solenoid, which is part of the door latch system. Continuing to run the dryer with a defective control circuit could cause additional damage to the electronics or create an uncontrolled condition with the door mechanism. It is best to stop use until the fault is repaired.
How much does it cost to repair an E42 error on an Electrolux dryer?
The primary repair for E42 is replacing the main electronics board. Parts alone for a replacement control board typically range from roughly 100 to 300 dollars depending on the specific dryer model. If a professional technician performs the repair, total costs including labor generally fall in the range of 200 to 450 dollars. Inspecting the wiring harness first is a low-cost step that could potentially save the expense of a board replacement if a harness fault is found.

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