Error Code
medium
Hobart AM16 – Not Dispensing Chemicals
On your HOBART AM16 DISHWASHERS unit, chemicals not dispensing typically indicates issues…
Hobart AM16 - Error 074: Detergent Not Sensed or Empty
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 074 indicates the detergent has not been sensed for multiple cycles. This usually means the detergent bottle is empty, improperly connected, or the pump needs priming. Verify the detergent supply and connection, then prime the detergent pump to resolve the issue.
Technical Details
Repair Steps:
- Inspect Detergent Supply: First, ensure the detergent bottle is not empty. If it is, replace it with a full bottle of approved commercial dishwasher detergent.
- Verify Cap and Tube Connections: Check that the detergent bottle cap is securely fastened and that the detergent suction tube is properly seated and free from kinks or air leaks. A loose connection can prevent the pump from drawing detergent.
- Prime the Detergent Pump: Press the ENTER button on the control panel as indicated by the machine to initiate a pump prime cycle. This forces detergent through the line and into the wash chamber. You may need to repeat this step a few times to ensure the line is fully purged of air.
- Check for Obstructions and Pump Operation: If the error persists after priming, inspect the detergent suction line for any clogs or blockages. Also, listen for the detergent pump operating during the prime cycle. If the pump is not running or making unusual noises, it may be faulty and require professional service.
- Reset and Monitor: After performing the above checks and actions, run a few test cycles to confirm the detergent is being dispensed and the error code 074 does not reappear.
Common Questions:
Q: Why does my AM16 DISHWASHERS show error 074 even if the detergent bottle isn’t empty?
A: This can happen if there’s air in the suction line, the tube is kinked or clogged, the cap isn’t sealing properly, or the level sensor itself is malfunctioning. The machine isn’t detecting detergent flow, even if the bottle contains liquid.
Q: How do I properly prime the detergent pump after refilling?
A: After ensuring the new bottle is connected, press the ENTER button on your HOBART AM16’s control panel as prompted. Listen for the pump’s activation and visually check if detergent is being drawn through the clear tubing. You might need to repeat the prime cycle a few times to clear any air pockets.
Q: Can using the wrong type of detergent cause this error or other issues?
A: Absolutely. Using non-approved or incorrect detergent can lead to improper sensing, poor wash results, foaming issues, and even damage to internal components like pumps, seals, and heating elements. Always use detergents specifically formulated for commercial high-temperature dishwashers.
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.