Hobart LXn/LXGn - Low Temperature Readings

⚠️ 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 HOBART LXn/LXGn SERIES DISHWASHERS unit, low temperature readings often stem from an insufficient incoming water supply temperature or the hot water supply being overwhelmed by rapid cycle use. It can also indicate an issue with the booster or sump heater settings. Address these factors promptly to ensure proper sanitization and operational efficiency.

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Technical Details

Repair Steps:

  1. Verify Incoming Water Supply Temperature: Ensure the hot water supply feeding the dishwasher meets the manufacturer’s recommended minimum temperature, typically 140°F (60°C) for wash and 180°F (82°C) for rinse for sanitizing machines. Confirm your facility’s water heater is set correctly and capable of maintaining this temperature under demand.
  2. Assess Machine Usage and Hot Water Demand: If incoming water temperature is already low and the dishwasher is running cycles rapidly, the facility’s hot water supply system may be unable to meet the continuous demand. Consider staggering wash cycles or evaluating the capacity of your hot water heater and hot water recovery rate.
  3. Inspect Booster and Sump Heater Settings and Function: Check if the internal booster heater (for rinse water) and sump heater (for wash water) settings are appropriate. Use a thermometer to verify water temperatures in the wash tank and during the final rinse cycle. If temperatures remain low despite adequate incoming supply, the heaters may be malfunctioning or incorrectly set.
  4. Contact Hobart Service for Heater Issues: If you suspect the booster heater or sump heater is faulty, incorrectly configured, or requires adjustment, contact your local Hobart Service Office. These components are critical for achieving sanitization temperatures and often require specialized diagnostics and repair by a qualified technician.

Common Questions:

Q: What is the recommended minimum water temperature for a commercial dishwasher?

A: For sanitizing dishwashers like the HOBART LXn/LXGn series, the incoming water for the wash cycle should typically be at least 140°F (60°C), and the final rinse water should reach 180°F (82°C) or higher to ensure proper sanitization.

Q: Can rapid cycle use cause low temperature readings?

A: Yes, if your facility’s hot water supply cannot keep up with the demand of continuous, rapid dishwashing cycles, the water entering the machine may not be consistently hot enough, leading to low temperature readings.

Q: When should I contact Hobart Service for low temperature issues?

A: You should contact Hobart Service if, after verifying incoming water temperature and usage patterns, the machine still displays low temperatures, especially if you suspect a malfunction with the internal booster or sump heaters.

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.

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