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Error code reference

Electrolux Washer Error Code 43

Door lock triac failure.

Electrolux codesElectrolux washer codes

Door lock triac failure.

First step from the service manual

Refer to test (6) - Check door lock and wiring to main control board.

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

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What 43 means on a Electrolux washer

Error code 43 on an Electrolux washer indicates a door lock triac failure. The triac is a semiconductor switching device located on the main control board that controls the flow of electrical current to the door lock assembly. When the control board sends a signal to lock or unlock the door, it routes current through this triac. If the triac becomes shorted, fails open, or otherwise malfunctions, the control board detects an abnormal electrical condition in that circuit and triggers error code 43. This is distinct from a simple door lock failure; the fault originates in the switching component on the board itself rather than the mechanical lock.

The door lock system is a critical safety circuit. The washer will not begin or continue a wash cycle unless the control board confirms that the door is properly secured. A failed triac can prevent the lock from engaging or releasing, leaving the machine unable to operate or, in some cases, unable to open the door after a cycle. The failure may be caused by a voltage spike, overheating of the board, moisture intrusion, or long-term component degradation.

Diagnosis begins with test (6), which involves inspecting the door lock assembly and the wiring harness that connects it to the main control board. Technicians should check the wiring for chafing, corrosion, or loose connections before condemning the board. If wiring and the lock assembly test within spec, the main control board with the failed triac is the likely replacement target.

Source: manufacturer service documentation.

Common causes of 43

  1. 01

    Failed door lock triac on main control board

    Part replacement

    The triac on the main control board that switches power to the door lock may be shorted or burned out. This is the primary cause indicated by error code 43 and typically requires replacement of the main control board.

  2. 02

    Damaged or loose wiring harness

    Wiring / connection

    Wiring between the door lock assembly and the main control board can develop shorts, breaks, or loose connections that cause abnormal electrical readings in the triac circuit. Inspect the harness for chafing, corrosion, or disconnected terminals.

  3. 03

    Faulty door lock assembly

    Part replacement

    A defective door lock solenoid or switch can place an unexpected electrical load on the triac, contributing to the fault. Testing the lock assembly for proper resistance and continuity can confirm or rule out this component.

  4. 04

    Moisture or corrosion on the control board

    Part replacement

    Water intrusion near the control board can cause corrosion on the triac or surrounding circuits, degrading their function. Visually inspect the board for signs of water damage, discoloration, or corroded solder joints.

See the test procedure for each cause

Frequently asked questions about 43

What does 43 mean on a Electrolux washer?
Error code 43 on an Electrolux washer signals a door lock triac failure. The triac is a switching component on the main control board that controls electrical current to the door lock. When this component fails, the washer cannot properly engage or release the door lock and stops operating. Diagnosis should start with inspecting the door lock assembly and the wiring connecting it to the control board.
Can I fix error code 43 on my Electrolux washer myself?
A knowledgeable DIYer can begin by inspecting the wiring harness between the door lock and the main control board for loose connections, chafed wires, or corrosion, as these are sometimes the root cause. However, if the triac on the main control board has failed, board replacement is required, which involves working with line-voltage components. If you are not comfortable working with electrical components, a qualified technician should handle the repair.
Is it safe to use my Electrolux washer when error code 43 is displayed?
You should not continue using the washer while error code 43 is active. The door lock circuit is a primary safety system, and a triac failure means the machine cannot reliably confirm that the door is secured during operation. Running the washer in this condition could pose a safety risk or cause additional damage to components.
How much does it cost to repair error code 43 on an Electrolux washer?
Repair costs depend on the root cause. If the issue is a wiring connection, costs may be minimal, covering only a service call in the range of $75 to $150. If the main control board requires replacement, parts alone can range from $150 to $350 or more, with total repair costs including labor typically falling between $250 and $500. Getting a diagnosis before committing to parts is advisable.
Will resetting my Electrolux washer clear error code 43?
A power reset may temporarily clear the error code, but if the triac or associated wiring has a genuine fault, the code will return as soon as the washer attempts to engage the door lock again. A reset is useful for ruling out a transient electronic glitch, but persistent return of code 43 indicates a hardware problem that requires physical inspection and repair.

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