E9
Hobart
Control Board / Power Supply Fault
Hobart dishwasher shows E9; control panel unresponsive or random resets during operation.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Main control PCB failure, Loose power connections, Internal low-voltage power supply fault, Moisture ingress into control compartment
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before opening any electrical compartments.
- Check power supply: Verify that the dishwasher is on a dedicated circuit with correct voltage and that breakers are not tripping. Loose or undersized wiring can cause resets.
- Inspect control compartment: Remove the control panel or top cover to access the main PCB. Look for signs of moisture, corrosion, or burned components.
- Dry and protect: If moisture is present, identify and correct the source (door gasket leak, steam vent issue). Allow the compartment to dry completely before re-energizing.
- Check connectors: Reseat all multi-pin connectors to the control board, ensuring they are fully engaged and free of corrosion.
- Board replacement: If E9 persists and the board shows visible damage or fails basic voltage checks, the main control PCB will likely need replacement by a Hobart technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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