Error Code
medium
Hobart AM16 – Not Dispensing Chemicals
On your HOBART AM16 DISHWASHERS unit, chemicals not dispensing typically indicates issues…
Hobart AM16 - Error 090: Wash Temperature Not Reached
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 AM16 DISHWASHERS unit, error 090 indicates the wash temperature failed to reach its minimum set point within the allotted time. This critical error prevents proper sanitation and operation. First, attempt a reset by holding the power button for 5 seconds; if it persists, a component failure in the heating circuit is likely.
Technical Details
Repair Steps:
- Initial Reset: As per the machine’s instructions, press and hold the power button for 5 seconds. The machine will drain and power off. Allow a brief pause, then power it back on to see if the error clears.
- Verify Hot Water Supply & Booster Heater: Ensure the dishwasher is receiving an adequate supply of hot water at the correct temperature and pressure. If your AM16 is equipped with a booster heater, verify it is functioning correctly and preheating incoming water to the specified temperature before it enters the wash tank.
- Inspect Heating Element:
A. Disconnect Power: ALWAYS shut off the main power supply to the dishwasher before performing any inspection or repair.
B. Access Element: Locate the wash tank heating element. It’s typically submerged in the wash tank.
C. Check for Continuity: Use a multimeter to test the heating element for continuity. Place the probes across the terminals of the element. A reading of “OL” (open line) or infinite resistance indicates a broken heating element, requiring replacement.
D. Visual Inspection: Look for any visible damage, severe scale buildup, or burnt spots on the element. - Test Temperature Sensor (Thermistor/RTD):
A. Locate Sensor: Find the wash tank temperature sensor, usually a thermistor or RTD type.
B. Measure Resistance: Disconnect the sensor from the control board. Use a multimeter to measure its resistance. Compare this reading to the manufacturer’s specified resistance-temperature chart for your specific sensor. - Check Heating Contactor/Relay:
A. Locate Contactor: Identify the contactor or solid-state relay (SSR) that controls power to the heating element.
B. Inspect for Damage: Look for any signs of arcing, burning, or physical damage. - Examine Wiring & Connections: Thoroughly inspect all electrical wiring and connections associated with the heating element, temperature sensor, and heating contactor/relay. Look for loose connections, frayed wires, corrosion, or any other damage. Secure or repair as necessary.
- Control Board Evaluation (Qualified Technician Only): If all external components test correctly, the issue may stem from the main control board’s inability to energize the heating circuit or correctly interpret the temperature sensor’s signal. This diagnosis typically requires advanced troubleshooting and specialized tools, and should only be performed by a qualified Hobart service technician.
Common Questions:
Q: What does error code 090 signify on a HOBART AM16 DISHWASHERS unit?
A: Error code 090 indicates that the dishwasher’s wash temperature failed to reach its minimum required set point within the allotted time. This prevents proper cleaning and sanitization.
Q: Can I clear error 090 myself, and will the dishwasher work afterward?
A: You can attempt to clear the error by pressing and holding the power button for 5 seconds, which will initiate a drain and power-off sequence. If the error persists after restarting, the machine will not function correctly and requires further troubleshooting as the heating issue remains.
Q: What are the most common causes for the HOBART AM16 to display error 090?
A: The most frequent causes for this error include a faulty or open wash tank heating element, an insufficient hot water supply to the machine (or a malfunctioning booster heater), a defective temperature sensor, or a problem with the heating circuit on the main control board or its associated contactor/relay.
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.