Error Code
medium
Hobart AM16 – Not Dispensing Chemicals
On your HOBART AM16 DISHWASHERS unit, chemicals not dispensing typically indicates issues…
Hobart AM16 - Error 021: Drain Hose Clogged or Restricted
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 AM16 DISHWASHERS unit, error code 021 indicates significant water remaining in the wash tank after the drain cycle, typically due to a clogged or restricted drain hose. To resolve, first power off the machine and allow water to cool. Then, thoroughly inspect the standpipe, wash tank bottom, and the entire drain hose for debris or kinks, cleaning as necessary.
Technical Details
Repair Steps:
- Perform Safety Shutdown: Always disconnect the dishwasher from its power source and allow the wash water to cool completely before performing any inspection or cleaning.
- Inspect Wash Tank and Standpipe: Remove the interior racks and inspect the wash tank bottom and the standpipe (if applicable) for any large food particles, silverware, or other debris that might be blocking the primary drain opening. Clear any obstructions found.
- Clean the Drain Hose: Locate the drain hose, typically found running from the base of the machine to a floor drain or waste receptor. Disconnect the hose and thoroughly flush it with water to remove any buildup of grease, food debris, or limescale. Use a hose brush if necessary to dislodge stubborn clogs.
- Check Drain Hose Installation and Condition: Inspect the entire length of the drain hose for any kinks, twists, or severe bends that could restrict water flow. Ensure the hose is properly installed with adequate pitch to facilitate drainage and that it is securely connected without leaks.
- Test and Reset the Machine: Reconnect the drain hose and restore power to the dishwasher. If the error remains on the screen, press and hold the power button for 5 seconds to clear the error. The machine should attempt to drain and power down. Run a test cycle to confirm proper drainage.
- Consider Drain Pump (If Applicable): If the drain hose and tank are clear and the error persists, there may be an issue with the drain pump itself (if your model uses one). This would require professional diagnosis and potential replacement of the drain pump or associated components.
Common Questions:
Q: What are the primary causes of error code 021 on a HOBART AM16 DISHWASHERS?
A: Error code 021 is typically caused by physical obstructions in the drain path, such as food debris, silverware, or mineral buildup within the wash tank, standpipe, or the drain hose itself. Kinks or improper installation of the drain hose can also restrict water flow.
Q: How can I prevent the drain hose from becoming clogged in my commercial dishwasher?
A: Regular preventative maintenance is key. Ensure staff scrape plates thoroughly before loading, regularly clean the wash tank and standpipe, and periodically inspect the drain hose for debris or kinks. Using a pre-rinse station can significantly reduce food solids entering the dishwasher.
Q: The error persists after cleaning the drain hose and checking for kinks. What should I do next?
A: If you’ve thoroughly cleared all visible obstructions and the error persists, it may indicate a deeper issue such as a faulty drain pump, a malfunctioning drain valve, or a sensor problem. At this point, it is recommended to contact a qualified commercial kitchen technician for a professional diagnosis and repair.
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.