Hobart LXn/LXGn - Will Not Fill or Will Not Fill High Enough

🛑 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 HOBART LXn/LXGn SERIES DISHWASHERS unit, a failure to fill or reach the proper water level typically indicates an issue with the water supply or internal water management components. This can stem from insufficient incoming water pressure, clogged strainers, or a malfunctioning fill valve. Prompt diagnosis and repair are crucial to restore full dishwasher functionality.

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Technical Details

Repair Steps:

  1. Verify Main Water Supply Valves: Ensure that all upstream main water supply valves leading to the dishwasher are fully open. A partially closed valve will restrict water flow and pressure.
  2. Inspect Inlet Hose Strainer: Locate the inlet water hose connection point on the dishwasher. Turn off the main water supply, disconnect the hose, and carefully remove the integrated strainer screen. Clean any accumulated debris, scale, or sediment that may be restricting water flow. Reinstall the clean strainer and reconnect the hose securely.
  3. Check Site Water Pressure: Use a pressure gauge to measure the dynamic water pressure at the dishwasher’s inlet point while the machine attempts to fill. Compare this reading to the minimum flow pressure requirements specified in your HOBART LXn/LXGn SERIES DISHWASHERS technical manual, typically 20-25 PSI. If pressure is too low, investigate building plumbing or booster pump issues.
  4. Test Fill Solenoid Valve: With power disconnected, test the fill solenoid valve for continuity using a multimeter. If the solenoid coil is open or shorted, the valve will not open. Also, inspect the valve internally for physical obstructions, debris, or a seized plunger that prevents water passage. Replace the fill solenoid valve if faulty.
  5. Examine Water Level Sensor/Float Switch: Depending on your specific LXn/LXGn model, inspect the water level sensor or float switch mechanism within the wash tank. Ensure it is free of debris, scale, or damage that could prevent it from accurately sensing the water level, thus preventing the machine from filling sufficiently. Clean or replace the water level sensor or float switch as needed.
  6. Consult Service Manual: If the above steps do not resolve the issue, consult your HOBART LXn/LXGn SERIES DISHWASHERS service manual for detailed wiring diagrams and further diagnostic procedures for water fill system components.

Common Questions:

Q: Why isn’t my Hobart LXn/LXGn dishwasher filling with enough water?

A: Common causes include low incoming water pressure, a clogged inlet hose strainer, a malfunctioning fill solenoid valve, or an issue with the water level sensor or float switch.

Q: What is the minimum water pressure required for a Hobart LXn/LXGn dishwasher?

A: While specific requirements can vary by model, HOBART LXn/LXGn SERIES DISHWASHERS typically require a minimum dynamic water pressure of 20-25 PSI (1.4-1.7 bar) to ensure proper and efficient filling.

Q: Can a clogged hose strainer affect both water flow and pressure?

A: Absolutely. A clogged inlet hose strainer acts as a significant restriction in the water line, reducing both the overall volume of water (flow) and the pressure available to the dishwasher, leading to insufficient filling.

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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