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Error code reference

Electrolux Dryer Error Code EA2

CRM satellite board protocol incongruence alarm

Electrolux codesElectrolux dryer codes

CRM satellite board protocol incongruence alarm - software of main board and satellite board not compatible.

First step from the service manual

Check main board and satellite board software compatibility.

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

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What EA2 means on a Electrolux dryer

The EA2 error code on an Electrolux dryer indicates a CRM satellite board protocol incongruence alarm. This means the software version running on the main control board and the software version running on the satellite board are not compatible with each other. The dryer's control system relies on two separate boards communicating through a defined protocol, and when those boards carry mismatched firmware versions, they cannot properly exchange data, triggering this fault.

The satellite board, sometimes called the CRM satellite board, handles specific control functions and must operate in sync with the main board via a shared communication protocol. When the protocol versions differ, the handshake between the two boards fails. This incompatibility can arise after a board replacement is performed using a part carrying a different firmware revision than the installed board, or it can occur if a firmware update is applied to only one of the two boards.

Diagnosing EA2 starts with confirming whether the software versions on both the main board and satellite board are compatible. If one board was recently replaced, verify that the replacement part matches the firmware requirements of the existing board. In some cases, the main board itself may need to be replaced with a version that matches the satellite board's protocol, or vice versa. This is not a sensor failure or wiring fault, it is a software-level mismatch requiring firmware or hardware alignment between the two boards.

Source: manufacturer service documentation.

Common causes of EA2

  1. 01

    Replacement board with incompatible firmware

    Part replacement

    If either the main board or satellite board was recently replaced, the new part may carry a different firmware version than the existing board. This is the most common trigger for EA2 and requires sourcing a board with the correct firmware revision.

  2. 02

    Partial firmware update applied to one board only

    Wiring / connection

    If a software or firmware update was performed on only one of the two boards, the protocol versions will no longer match. Both boards must be updated together to maintain compatibility.

  3. 03

    Incorrect board ordered during prior repair

    Part replacement

    A board that appears physically identical may carry a different software version intended for a different production run or model variant. Checking compatibility before installation is critical to avoid this mismatch.

  4. 04

    Corrupted firmware on main or satellite board

    Part replacement

    In rare cases, firmware corruption on one of the boards can cause it to report an incompatible protocol version even if the correct software was originally installed. This typically requires board replacement rather than reprogramming.

See the test procedure for each cause

Frequently asked questions about EA2

What does EA2 mean on a Electrolux dryer?
EA2 indicates a CRM satellite board protocol incongruence alarm, meaning the software on the main control board and the satellite board are not compatible with each other. The two boards communicate through a defined protocol, and a version mismatch prevents that communication from functioning correctly. This error is a software-level conflict rather than a mechanical or sensor failure.
Can I fix the EA2 error myself without calling a technician?
Resolving EA2 requires identifying the firmware versions on both the main board and satellite board and confirming they are compatible. This is a technically involved task that generally requires a qualified appliance technician, especially if a board replacement is needed. DIY resolution is unlikely unless you have access to firmware documentation and the tools to verify board versions.
Is it safe to run my dryer while the EA2 code is displayed?
When EA2 is active, the main board and satellite board cannot communicate properly, which means the dryer may not operate as intended or may not operate at all. Running the dryer in this condition is not recommended, as control functions may be unreliable. It is best to leave the dryer off until the board compatibility issue is resolved.
How much does it cost to repair an EA2 error on an Electrolux dryer?
Repair costs for EA2 depend on whether one or both control boards need to be replaced. Board replacement parts can range from roughly $80 to $300 or more depending on the specific board required. Adding labor costs from a technician, total repair costs typically fall in the range of $150 to $500. Getting a diagnostic visit from a technician first will help clarify exactly which component needs to be addressed.
Will resetting the dryer clear the EA2 error code?
A simple power reset will not resolve EA2 because the underlying cause is a firmware or software incompatibility between the two control boards, not a temporary fault. The error will return as soon as the dryer attempts to re-establish communication between the boards. Clearing the code permanently requires correcting the software version mismatch, either by replacing a board with the correct firmware version or by updating both boards to compatible versions.

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