Error Code
medium
Hobart AM16 – Not Dispensing Chemicals
On your HOBART AM16 DISHWASHERS unit, chemicals not dispensing typically indicates issues…
Hobart AM16 - Error 020: Wash Tank Pressure Sensor Error
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 AM16 DISHWASHERS unit, error code 020 indicates the wash tank water level did not reach the expected amount after the rinse cycle fill. This typically points to an issue with water supply, drainage obstruction, or the wash tank pressure sensor. Begin by ensuring the tank is clean and clear of debris, then attempt to clear the error.
Technical Details
Repair Steps:
- Verify Water Supply: Ensure the main water supply valve to the dishwasher is fully open and that there is adequate water pressure. Check for any kinks or blockages in the supply lines.
- Inspect Wash Tank and Strainers: Open the dishwasher door and visually inspect the wash tank for any debris, food particles, or scale buildup that could obstruct the fill ports or interfere with water level sensing. Remove and clean all strainers, filters, and wash arms thoroughly.
- Check Drain Line for Obstructions: Although the error is about under-fill, a partially obstructed drain can sometimes cause incorrect level readings or prevent proper draining before refill. Ensure the drain hose is not kinked, crushed, or clogged.
- Reset the Machine: Press the ENTER button on the control panel to clear the error. The machine will typically drain and attempt to reset. Run a test cycle to observe if the wash tank fills correctly and the error does not reappear.
- Inspect the Wash Tank Pressure Sensor/Level Sensor: If the error persists, the pressure sensor or level electrode responsible for monitoring the wash tank water level may be faulty or obstructed. Power down and disconnect the machine from its electrical supply. Access the sensor (often located near the bottom of the wash tank or connected via a hose) and check for physical damage, loose electrical connections, or blockages in its sensing tube.
- Consult Wiring Diagram and Test Sensor (Advanced): For experienced technicians, consult the machine’s wiring diagram to precisely locate the pressure sensor and its connections to the control board. Use a multimeter to test the sensor’s output, if applicable, or check for proper voltage supply to the sensor as per manufacturer specifications.
Common Questions:
Q: What does error 020 on my HOBART AM16 DISHWASHERS mean?
A: Error 020 indicates that the wash tank water level did not reach the anticipated amount after being filled by the rinse cycle. This suggests a problem with water filling, drainage, or the level sensing system.
Q: What should I do first when I see error 020?
A: First, ensure the wash tank is clean and free of debris. Then, press the ENTER button to clear the error. The machine will drain and restart, which may resolve a temporary issue.
Q: When should I call Hobart Service for this error?
A: If after checking for cleanliness, verifying water supply, and restarting the machine, the 020 error persists, it is advisable to contact Hobart Service. This indicates a more complex issue with the water level sensor or associated components requiring professional diagnosis.
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.