Hobart LXn/LXGn - Error 009: Wash tank temperature not reached during wash cycle

⚠️ Caution / Monitor Closely
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 009 indicates the wash tank did not achieve its set temperature within the expected time during a wash cycle. This issue severely compromises the machine's sanitization capability. You must investigate the heating element, water level, and temperature sensor immediately to identify and rectify the underlying cause.

Can't fix it yourself?

Our certified technicians can help you on-site.

Technical Details

Repair Steps:

  1. Verify Water Supply and Level: Ensure the dishwasher is filling to the correct operational level. Insufficient water volume in the wash tank will prevent the heating element from properly submerging and reaching the setpoint. Check for proper water supply pressure and any issues with the fill valve.
  2. Inspect the Wash Tank Heating Element: Power down the unit and disconnect it from the electrical supply. Access the wash tank heating element. Use a multimeter to check for continuity across the element’s terminals. A lack of continuity indicates an open circuit, meaning a failed heating element. Also, check for any visible signs of damage, corrosion, or scale buildup. If faulty, replace the heating element.
  3. Check the Wash Tank Temperature Sensor (Thermistor/Thermostat): Locate the temperature sensor in the wash tank. Disconnect it and test its resistance using a multimeter. Compare the reading to the specifications in the Hobart service manual for the LXn/LXGn series at ambient temperature. A reading significantly outside the specified range indicates a faulty sensor. Verify its wiring connection to the control board; ensure it is secure and free of corrosion. If faulty, replace the temperature sensor.
  4. Examine the Heating Element Contactor/Relay: The control board uses a contactor or relay to supply power to the heating element. With the machine powered off, visually inspect the contactor for signs of arcing or burnt contacts. With the machine safely powered on (and caution exercised), verify if the contactor pulls in when the heating cycle is activated. If it fails to engage or remains disengaged, it may be faulty or not receiving the correct signal from the control board. If faulty, replace the contactor/relay.
  5. Inspect the Main Control Board: While less common, a faulty main control board can fail to energize the heating circuit or misinterpret temperature sensor readings. Inspect the board for any visible damage, burnt components, or loose connections. If all other components (heating element, sensor, contactor) test good, the control board may require further diagnostics by a qualified Hobart technician or replacement.

Common Questions:

Q: Why is proper wash tank temperature crucial for my HOBART LXn/LXGn dishwasher?

A: Proper wash tank temperature is critical for effective sanitization and the efficient removal of food debris and grease. Commercial dishwashers must meet specific temperature thresholds to comply with health codes and ensure dishes are clean and safe for use.

Q: Can I manually reset error code 009, or does it require a repair?

A: The machine prompts you to press the ENTER button to clear the error. However, this is usually a temporary reset. If the underlying issue (e.g., faulty heating element, sensor) is not addressed, the error will likely reappear, indicating a required repair to restore full functionality.

Q: What are the common causes of a wash tank not reaching temperature?

A: The most common causes include a failed heating element, a faulty temperature sensor (thermistor or thermostat), insufficient water level in the tank, or a malfunctioning contactor/relay that supplies power to the heating element. Less frequently, a control board issue can also be the culprit.

When to call a technician

Consider calling a certified technician if:

  • The error keeps coming back after you've tried the steps above.
  • You're not comfortable doing the checks or repairs yourself.
  • You notice unusual noise, smell, or behaviour.
  • Equipment is under warranty and you want official service.
  • You need the unit back in service quickly with minimal downtime.

Need Professional Help?

Our certified technicians can help you on-site.

Other LXn/LXGn Error Codes

🔧 Fix this Error - Call Pro