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Dishwasher Main control board: What It Does and Signs It's Failing

The circuit board that runs the cycle, either in the door behind the control panel or in the base under the tub, depending on the design. It switches power to the pumps, heater, inlet valve, fan and dispenser, and reads all the sensors.

How it works

The board follows the cycle program step by step, using sensor readings to decide when to fill, heat, wash and drain. When something reports out of range it stops and shows an error code.

Signs it is failing

• Codes that make no sense or change every cycle
• A part that never gets power even though the part itself checks out
• A completely dead machine with power at the outlet
• A burned smell or scorch marks near the board

Most codes name a part first and list the board as a less likely cause. Repair references point out that boards are often misdiagnosed, so rule out the cheap parts first.

Can you replace it yourself?

Cut power at the breaker for a minute or two to reset the board; that clears a lot of one-off codes. Bosch suggests about 10 minutes if the machine beeps with a blank display. Diagnosing and replacing a board belongs with a tech. Never open a control board or try to repair it.

Buying the right part

A board is one of the priciest parts in a dishwasher. Have the diagnosis confirmed, check whether the seller takes back installed electrical parts, then buy the OEM board for your model number.

Error codes linked to the main control board

• E01-E05Control board or electronics faultBosch
• iC0Electronic control problemFrigidaire
• F6E1User interface or main control errorKitchenAid
• F1E1Control module faultKitchenAid
• F1E2 / F2E2Main control communication errorKitchenAid
• F24Heating relay faultMiele
• CE / ACCommunication error between boardsSamsung
• F9E2Drain motor errorWhirlpool
• F7E2Wash motor errorWhirlpool
• F4E2 / F4E3Heating errorWhirlpool
• F6E1Control panel or main control errorWhirlpool
• F1E1Control board faultWhirlpool
• F1E2 / F2E2Control communication errorWhirlpool
• F2E1Stuck button or console errorWhirlpool

Last reviewed 2026-10-19.