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Error code reference

Electrolux Washer Error Code E66

Heating element defect

Electrolux codesElectrolux washer codes

Heating element defect – incongruence between antiboil 1/2 and relay, connection heating element interrupted, cable defective.

First step from the service manual

Replace heating element, replace cable, replace pressure switch antiboil.

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

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What E66 means on a Electrolux washer

The E66 error code on an Electrolux washer indicates a heating element defect, specifically an incongruence detected between the antiboil sensors (antiboil 1 and antiboil 2) and the heating relay circuit. The antiboil system uses pressure switches to monitor water temperature indirectly by detecting steam or boiling conditions. When the control board detects a mismatch between the state reported by these antiboil pressure switches and the expected relay behavior for the heating circuit, it triggers E66 to protect the machine and load from overheating.

The fault has three primary origins: a failed or open-circuit heating element, a broken or disconnected cable in the heating element wiring harness, or a defective antiboil pressure switch. A heating element that has developed an internal break will interrupt the circuit, preventing current flow even when the relay closes. A damaged cable, corroded connector, or loose terminal in the wiring between the control board and the heating element produces the same open-circuit symptom. In either case, the control board cannot confirm normal heating operation and logs the fault.

Diagnosing E66 requires inspecting the heating element for continuity using a multimeter, checking the resistance of the element against expected values, and inspecting the full wiring harness from the element to the board for damage, burns, or disconnection. The antiboil pressure switch should also be tested, as a switch stuck in the wrong position creates the incongruence the board is reporting. Replacement of the heating element, the connecting cable, or the antiboil pressure switch resolves the fault depending on which component tests out of specification.

Source: manufacturer service documentation.

Common causes of E66

  1. 01

    Failed heating element

    Part replacement

    The heating element has developed an internal break, creating an open circuit that the control board detects as a heating fault. Testing the element with a multimeter for continuity will confirm whether it has failed.

  2. 02

    Broken or disconnected wiring cable

    Part replacement

    The cable connecting the heating element to the control board may be cut, corroded, or pulled loose from a connector. Visual inspection of the harness and terminal connections near the element will reveal damage.

  3. 03

    Defective antiboil pressure switch

    Part replacement

    The antiboil pressure switch monitors for boiling or overheating conditions. If it is stuck in an incorrect position or has failed internally, it creates the incongruence between switch state and relay state that triggers E66.

  4. 04

    Corroded or loose connector at the heating element

    Wiring / connection

    Moisture and heat can corrode the spade terminals at the heating element itself, increasing resistance or breaking contact entirely without the wire harness being otherwise damaged.

  5. 05

    Burned or faulty heating relay on the control board

    Part replacement

    If the relay responsible for switching power to the heating element has failed open, the board cannot energize the element and the antiboil sensor state will appear inconsistent. This is the least common cause but should be considered if all other components test good.

See the test procedure for each cause

Frequently asked questions about E66

What does E66 mean on a Electrolux washer?
E66 indicates a heating element defect caused by an incongruence between the antiboil pressure switches and the heating relay circuit. The fault can point to a failed heating element, a broken wiring cable, or a defective antiboil pressure switch. The washer uses this code to signal that the heating circuit is not behaving as expected, so it stops heating to protect the machine and laundry.
Can I fix the E66 error myself?
A knowledgeable DIYer with multimeter skills can test the heating element for continuity and inspect the wiring harness for visible damage. If the element is open-circuit or a cable is clearly broken, those parts can be replaced at home. However, testing and replacing the antiboil pressure switch or diagnosing a control board relay fault typically requires more appliance repair experience, so a technician visit may be warranted for those steps.
Is it safe to run my washer while the E66 code is showing?
It is not recommended to continue running the washer while E66 is active. The fault indicates the heating circuit is not working correctly, and continuing to operate the machine could cause further damage to wiring or the control board. Most machines will also fail to complete wash programs that require water heating, so the wash results will be compromised.
How much does it cost to repair an E66 error on an Electrolux washer?
Repair costs depend on which component has failed. A replacement heating element typically runs in the range of $30 to $80 for parts, while an antiboil pressure switch generally costs $15 to $50. Adding professional labor, the total repair cost usually falls between $100 and $250, though costs can be higher if the control board relay is also involved.
Will resetting the washer clear the E66 error code?
A power reset may temporarily clear the E66 code from the display, but the fault will return as soon as the washer attempts to heat water again if the underlying problem has not been fixed. The incongruence between the antiboil switches and the heating relay is a hardware fault that requires physical inspection and component replacement, not just a reset.

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