Hobart LXn/LXGn - Error 089: Booster Heater Contactor Error

🛑 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, error code 089 indicates a critical failure where the booster heater remains energized despite software commands to shut off. This typically points to a faulty booster heater contactor or a control board issue. The machine will enter a protective fill and drain cycle, requiring immediate shutdown and authorized technician intervention.

Can't fix it yourself?

Our certified technicians can help you on-site.

Technical Details

Repair Steps:

  1. Immediate Power Cycle: As the error description advises, immediately turn off the main circuit breaker supplying power to the HOBART LXn/LXGn dishwasher. This is a critical safety measure to prevent overheating or potential damage due to the booster heater remaining constantly on. Wait at least 5 minutes before attempting to restore power, if at all, but the machine will likely re-fault upon restart.
  2. Contact Authorized Service: This error is explicitly “not user serviceable.” You must contact a qualified Hobart service technician. Explain the error code 089 and the symptoms (heater staying on, protective fill/drain cycle). The technician will have the necessary diagnostic tools and parts to address this critical issue safely.
  3. Technician Diagnostic & Repair:
    Upon arrival, a technician will perform the following:
    • Verify Contactor Functionality: The primary suspect is often the booster heater contactor. The technician will test the contactor for welded contacts or other internal failures that prevent it from opening.
    • Inspect Wiring and Connections: Check all wiring between the control board, contactor, and booster heater for signs of damage, shorts, or loose connections.
    • Examine Control Board: The main control board sends the command to energize or de-energize the contactor. A fault on the control board (e.g., a faulty relay driver) could cause the contactor to remain energized. The technician will diagnose the control board’s output.
    • Check Heater Element & Safety Thermostats: While less likely the primary cause of this specific “heater remains on” error, the technician may briefly inspect the booster heater element for integrity and ensure the high-limit thermostats are functional, although the machine’s protection cycle indicates they are likely not the primary fault source here.
    • Replace Faulty Components: Based on diagnosis, the technician will replace the defective contactor or control board.
    • Test System Operation: After replacement, the technician will thoroughly test the dishwasher’s booster heater operation through several cycles to ensure the heater cycles on and off correctly and the error code does not return.

Common Questions:

Q: What does error 089 mean on my HOBART LXn/LXGn SERIES DISHWASHERS?

A: Error code 089 indicates a critical issue where the booster heater remains continuously active, ignoring the control system’s command to turn off. The dishwasher initiates a protective fill and drain cycle to prevent overheating.

Q: Can I resolve the 089 error myself on my Hobart LXn/LXGn dishwasher?

A: No, the manufacturer explicitly states this error is “not user serviceable.” It involves critical electrical components like the booster heater contactor or control board, requiring a trained and authorized Hobart service technician for safe diagnosis and repair.

Q: What are the potential hazards if error 089 is ignored?

A: Ignoring error 089 can lead to severe overheating of the booster heater and surrounding components, potential damage to the dishwasher, excessive energy consumption, and in extreme cases, fire hazards. Immediate shutdown is crucial.

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.

Need Professional Help?

Our certified technicians can help you on-site.

Other LXn/LXGn Error Codes

🔧 Fix this Error - Call Pro