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Error code reference

Jenn-Air Dishwasher Error Code E:01

Communication error between the electronics (interface error between power module and operating module).

Jenn-Air codesJenn-Air dishwasher codes
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What the E:01 error code actually means

Your Jenn-Air dishwasher is showing an E:01 error because its two main control boards have lost the ability to communicate with each other. Think of it as the two electronic brains in your dishwasher not being able to send messages back and forth. This can sometimes be fixed by unplugging the dishwasher and plugging it back in, but if it keeps coming back, a technician will need to inspect the wiring connection between the boards or replace one of them.

Diagnostic procedure

The full E:01 procedure

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1
First diagnostic step
Check D-bus plug and socket connections (3-pole wire) for electrical connection faults. Disconnect appliance from power supply (unplug and plug in again). Run flash process again. Replace module.
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Most common causes of E:01

Ranked by how often they cause this code
  1. 1Loose or disconnected D-bus connector
  2. 2Corroded or damaged D-bus terminals
  3. 3Temporary communication glitch requiring power reset
  4. 4Failed operating module
  5. 5Failed power module

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Questions people ask about E:01

What does E:01 mean on a Jenn-Air dishwasher?
E:01 indicates a communication error between the dishwasher's power module and operating module. These two control boards exchange data through a 3-pole D-bus connection, and when that link fails or is interrupted, the appliance displays E:01 and stops operating. The cause can range from a loose connector to a failed module.
Will resetting the dishwasher clear the E:01 error?
A power reset, unplugging and reconnecting the appliance, can clear E:01 if the communication failure was caused by a temporary glitch. However, if the error reappears after the reset, there is likely a physical issue with the D-bus connector or a module failure that a reset alone will not resolve.
How much does it cost to repair a Jenn-Air dishwasher E:01 error?
If the fix is simply reseating the D-bus connector, the cost may be limited to a service call fee, typically in the range of $75 to $150 depending on your area. If a module replacement is needed, parts and labor combined can range from $150 to $400 or more, depending on which module has failed and local labor rates.
Can I fix the E:01 error myself without calling a technician?
In some cases, yes. Start by unplugging the dishwasher from the power outlet, waiting a minute, and plugging it back in, then run the flash process again. If you are comfortable accessing the interior of the appliance, you can also inspect the 3-pole D-bus connector between the two modules and reseat it firmly. If the error returns after these steps, a technician should evaluate the modules themselves.
Is it safe to use my Jenn-Air dishwasher when E:01 is displayed?
No. When E:01 is active, the dishwasher has halted because its control modules cannot communicate. Attempting to force the appliance to run in this state is not recommended, as the control systems are not functioning correctly. The issue should be diagnosed and resolved before resuming normal use.

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