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Error code reference

Kenmore Dryer Error Code E42

Door sensing failure due to a defective Electronic Control Board.

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What the E42 error code actually means

Your Kenmore dryer is displaying E42 because the main computer board inside the dryer cannot properly detect whether the door is open or closed. This is not a problem with the door itself, but with the circuit board that reads the door's status. Until the board is replaced, the dryer will likely refuse to start as a safety precaution.

Diagnostic procedure

The full E42 procedure

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First diagnostic step
Replace Electronic Control Board.
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Most common causes of E42

Ranked by how often they cause this code
  1. 1Defective Electronic Control Board
  2. 2Electrical surge or power spike damage
  3. 3Loose or corroded wiring connections at the ECB
  4. 4Intermittent board contact failure

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Questions people ask about E42

What does E42 mean on a Kenmore dryer?
E42 on a Kenmore dryer indicates a door sensing failure caused by a defective Electronic Control Board. The board is unable to correctly detect or interpret the door open/closed status signal. As a safety measure, the dryer will not operate while this fault is active. Replacing the Electronic Control Board is the recommended repair.
Is it safe to use my Kenmore dryer while E42 is showing?
No, you should not attempt to bypass or force the dryer to run while E42 is active. The error indicates the control board cannot confirm a safe door-closed condition, which is a critical safety interlock. Running the dryer in this state is not recommended and the appliance will typically refuse to start by design.
Will resetting my Kenmore dryer clear the E42 error code?
A power reset, such as unplugging the dryer for several minutes, may temporarily clear the E42 code, but the error will return if the Electronic Control Board is genuinely defective. A reset does not repair the underlying hardware failure. Persistent or recurring E42 codes after a reset confirm that board replacement is necessary.
Can I fix E42 on my Kenmore dryer myself?
If you are comfortable working with appliance electronics and disconnecting power safely, replacing the Electronic Control Board is a feasible DIY repair. Before purchasing a replacement board, check that all wiring harness connectors at the board are secure and free of corrosion, since a loose connection can sometimes produce this error. If connections are intact and the error persists, the board will need to be replaced.
How much does it cost to fix a Kenmore dryer E42 error?
The primary cost involves the Electronic Control Board replacement part, which typically ranges from $80 to $200 or more depending on the specific model. If you hire a technician, labor costs can add another $75 to $150 to the total repair bill. Getting a model-specific part quote before committing to the repair is advisable.

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