Hobart LXn/LXGn - Fills Too High Or Leaks From Door Due to Leaking Fill Solenoid Valve

🛑 Critical / Stop Operation
Warning: The information provided here is for educational purposes only. Working with commercial kitchen equipment involves high voltage, gas, and high temperatures. We strongly recommend contacting a certified service technician for any repairs. We are not responsible for any damage or injuries resulting from DIY repair attempts. This information is provided 'as is' without any guarantees of completeness or accuracy.

TLDR

On your LXn/LXGn SERIES DISHWASHERS unit, water continuously flowing even when powered off indicates a faulty or leaking fill solenoid valve. This can lead to overfilling, door leaks, and potential water damage if not addressed promptly. Immediately power off the dishwasher and shut off the water supply to prevent further issues.

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Technical Details

Repair Steps:

  1. Safety First: Immediately power off the dishwasher and disconnect it from the electrical supply. Turn off the main water supply valve to the dishwasher to prevent further water ingress or flooding.
  2. Locate the Fill Solenoid Valve: Refer to your Hobart LXn/LXGn SERIES DISHWASHERS service manual for the exact location of the fill solenoid valve. It is typically situated near the main water inlet connection point of the machine.
  3. Inspect the Valve: Visually examine the fill solenoid valve for any obvious signs of damage, corrosion, or mineral deposits (scale) around its body or connections. A visible drip or water stain indicates an internal or external leak.
  4. Test the Valve (Advanced): With the power and water supply safely disconnected, an experienced technician can use a multimeter to check the resistance of the solenoid coil. An “open” circuit or incorrect resistance indicates a faulty coil. However, a mechanical failure (stuck open) might not show an electrical fault.
  5. Replace the Fill Solenoid Valve:
    • Disconnect the electrical wiring from the solenoid coil. Make sure to note or photograph the wiring for correct reconnection.
    • Disconnect the water inlet and outlet hoses/pipes from the valve. Be prepared for some residual water to drain.
    • Unmount the old fill solenoid valve from its bracket or mounting points.
    • Install the new fill solenoid valve, ensuring all connections are tight and correctly oriented. Use new gaskets or thread sealant where specified by the manufacturer.
    • Reconnect the water hoses/pipes and the electrical wiring securely.
  6. Restore and Test: Slowly turn the main water supply back on and carefully check for any immediate leaks around the newly installed valve. Reconnect electrical power to the dishwasher. Run a short test cycle (e.g., a pre-wash) to confirm that the machine fills correctly and that the new valve closes completely when not energized. If the problem persists, further diagnosis of the control system may be necessary.

Common Questions:

Q: What is a fill solenoid valve and why is it important in my Hobart dishwasher?

A: The fill solenoid valve is an electrically controlled valve that opens and closes to allow water into the dishwasher for cycles like washing and rinsing. It’s crucial for accurately controlling water levels, preventing overfilling, and stopping water flow when the machine is off.

Q: Can I repair a leaking fill solenoid valve, or does it always require replacement?

A: While some minor issues like clogged screens or loose connections might be repairable, a persistently leaking fill solenoid valve typically indicates an internal component failure (e.g., a worn diaphragm or seal). In most cases, full replacement of the valve assembly is the recommended and most reliable solution.

Q: How can I prevent the fill solenoid valve from failing prematurely in my Hobart dishwasher?

A: Regular maintenance, such as ensuring proper water filtration and periodic descaling, can significantly extend the life of your fill solenoid valve. This prevents mineral buildup and debris from accumulating, which can cause the valve to stick or damage its internal seals.

When to call a technician

For this error, we recommend calling a certified technician. Do not continue operation or attempt repair yourself.

  • Equipment shows a critical or stop-operation fault.
  • You smell gas, burning, or see smoke or sparks.
  • Error returns after following the steps above.
  • You are not trained to work on this equipment.
  • Warranty or safety could be affected by DIY repair.

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