Error Code
medium
Hobart LXn/LXGn – LXn/LXGn Will Not Drain
On your HOBART LXn/LXGn SERIES DISHWASHERS unit, a "Machine Will Not Drain"…
Hobart LXn/LXGn - Error 018: Wash tank water level is too high
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, error code 018 indicates the wash tank water level has exceeded its upper limit. This often points to a faulty fill valve, a blocked level sensor port, or a malfunctioning level sensor. Initially, attempt to clear the error as instructed by the machine, and if it persists, thorough investigation of the water fill system is required.
Technical Details
Repair Steps:
- Perform Initial Reset: If displayed, press the ENTER button to clear the error. If not, press and hold the power button for 5 seconds. The machine will drain and power off. If the error reoccurs, proceed with further troubleshooting.
- Inspect Wash Tank and Level Sensor for Obstructions: Power off and disconnect the machine from its water supply. Carefully inspect the wash tank, particularly around the level sensor probe or float switch, for any food debris, scale, or foreign objects that could be obstructing the sensor’s operation or interfering with the water level detection.
- Examine the Water Fill Valve: Visually inspect the water fill valve, typically located near the water inlet. Check for any signs of continuous dripping, leaks, or if the valve appears stuck in an open position. With power off, disconnect the electrical connection and test the solenoid for continuity and proper mechanical closure.
- Test Level Sensor Functionality: Locate the wash tank level sensor (could be a pressure switch, float switch, or probe). Check its wiring for any damage, loose connections, or corrosion. If it’s a probe, ensure it’s clean and free of scale. If it’s a float, confirm it moves freely without sticking, indicating the correct water level. A faulty sensor may incorrectly signal a low level, leading to overfilling.
- Assess Water Inlet Pressure: While less common, excessively high incoming water pressure can sometimes force water past a slightly worn fill valve, leading to an overfill condition. This might require a pressure reducer if sustained high pressure is confirmed.
- Verify Drain System Integrity: Ensure the drain valve is fully opening and that the drain line itself is free from blockages. A slow or partial drain can lead to water accumulation and a perceived high level if the fill cycle continues beyond the intended point.
- Consider Control Board Malfunction: If all mechanical and electrical components of the fill and level sensing system are verified as functional, the issue might stem from a faulty control board. The control board could be misinterpreting sensor inputs or sending incorrect commands to the fill valve. This typically requires professional diagnostic tools and possibly board replacement.
Common Questions:
Q: What causes error code 018 on a Hobart LXn/LXGn dishwasher?
A: Error code 018, indicating an excessive wash tank water level, is primarily caused by a faulty fill valve that fails to close completely, a blocked or malfunctioning level sensor, or a logic error on the control board leading to continuous filling.
Q: How can I prevent my Hobart dishwasher from overfilling?
A: Regularly clean the wash tank, especially around the level sensor, to prevent scale and debris buildup. Periodically inspect the fill valve for leaks or signs of wear, and ensure the drain system is clear and functional to prevent water accumulation.
Q: Is it safe to use my Hobart LXn/LXGn dishwasher with error 018?
A: No, it is not safe. An overfilling wash tank can lead to water leaks, potential electrical hazards, damage to the machine, and an unsanitary environment. The machine is designed to stop operation to prevent these issues, and the error must be resolved before use.
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.