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Asko Dishwasher Error Code F40

Error code F40 indicates a heating element or temperature sensor malfunction that prevents the dishwasher from reaching or maintaining proper water temperature during the wash cycle. This error stops the cycle to protect the appliance and ensure dishes are cleaned properly.

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Problems You May Notice

    • Dishwasher stops mid-cycle and displays F40 error code on control panel • Water temperature remains cold or lukewarm instead of reaching proper wash temperature • Wash cycle fails to complete or repeats unexpectedly • Dishes come out unwashed or poorly cleaned • Error code persists even after attempting to restart the dishwasher • Control panel may show temperature-related warning messages alongside the F40 code
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Possible Causes

    • Faulty heating element unable to generate sufficient heat with 120V/240V electrical supply • Malfunctioning temperature sensor providing incorrect readings to control board • Loose or corroded electrical connections to heating element or sensor • Control board failure preventing proper communication with heating components • Incoming water supply not reaching minimum temperature for effective heating • Tripped thermal overload protection due to excessive heating attempts • Mineral buildup or sediment on heating element reducing efficiency in hard water areas common across USA regions
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Safety Checks You Can Do

    • Check your home's circuit breaker panel to ensure the breaker serving the dishwasher is in the ON position; if tripped, switch it fully OFF then back ON • Verify the dishwasher door closes completely and latches properly with no obstructions • Empty the dishwasher completely and inspect the tub interior for any visible debris or mineral deposits • Confirm the water inlet valve shut-off (if accessible under your sink) is fully open • Allow the dishwasher to cool for 15-20 minutes before attempting to run another cycle • Reset the dishwasher by turning off the dedicated circuit breaker for exactly 60 seconds, then switch it back ON and wait 2-3 minutes for full system reboot • Run a test cycle on the shortest wash setting to see if error recurs • If you have access, check that all visible electrical connectors behind the kickplate are secure and free from corrosion
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NOTE!

If the error code persists, call to schedule your service

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