Hobart Commercial Dishwasher Error Code Ed: Slow Leak
Ed on a Hobart AM15 dishwasher means a slow leak. Make sure the drain lever is closed, the standpipe is seated and the O-ring is clear of food soil or debris.
Low: an operator-fixable drain check, though a leak left alone may worsen.
- Code
- Ed
- Maker
- Hobart
- Equipment
- Dish machines
- Applies to
- AM Select AM15 family
What does Hobart error code Ed mean?
The AM Select machine holds its water at a level that the control expects to stay steady. If the level slowly drops while the machine is meant to be holding water, the control reads it as a slow leak and shows Ed. The manual lists three causes, all about the drain: the drain lever being open, the standpipe not seated, or debris on the O-ring that keeps it from sealing. Each of them lets water seep out of the tank. The fixes are simple and belong to the operator. Close the drain lever fully, press the standpipe down so it is properly seated, and wipe food soil from the O-ring. These checks only make sense at the drain, so if all three are right and Ed still shows, a technician looks for a leak elsewhere. The code is closely related to E2, which also depends on the drain sealing, but Ed is about water already in the tank slowly escaping.
Affected models and control systems
Hobart AM15 (ML-130038), AM15F (ML-130045), AM15T (ML-130039), AM15VL (ML-130153), AM15VLF (ML-130155) and AM15VLT (ML-130154).
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- Ed on the display
- Water level creeping down in the tank
- A small puddle forming under the drain area
Possible causes
Listed in Hobart's documentation
- Drain lever open
- Standpipe not seated
- Debris on the O-ring
Other likely causes — what usually sits behind error code Ed on this control. A technician confirms which one it is before any part is replaced.
- Drain O-ring worn so it no longer seals
- Hairline crack in the tank or fitting
- Loose drain connection slowly dripping
Safe checks before calling for service
- Check that the drain lever is fully closed.
- Push the standpipe down firmly into its seat.
- Wipe the O-ring clean of food soil and debris.
- Look under the machine for drips and tell us what you find.
How a technician diagnoses error code Ed
- Check the level over time with the machine idle.
- Inspect the standpipe seat and the O-ring for wear or damage.
- Look for leaks at the drain fitting and tank joints.
- Test the level sensing for false readings.
- Replace the O-ring or fitting and re-test.
- Tracing leaks inside the base of the machine can mean working near wiring that carries machine voltage.
- Checking the level sensing needs the machine opened and watched.
How error code Ed differs from similar codes
Ed is a slow leak that is already in the tank, while E2 is the fill that did not reach the float in time.
Technical reference
- Maker documentation
- Hobart owner support
- Edition
- FORM 35320 Rev. E (October 2012)
- Models / control
- AM Select AM15 family
- Section
- TROUBLESHOOTING (page 30)
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Hobart dish machine error codes
What causes Ed?
The manual lists the drain lever open, the standpipe not seated, and debris on the O-ring.
Can I wipe the O-ring myself?
Yes, clearing food soil off the O-ring is on the manual's list.
Will Ed fix itself?
Only if the cause was a lever or standpipe that you then close and seat.
Need help with Hobart error code Ed?
A technician confirms the cause on site and gives you the price in writing before any work starts.