Hobart Commercial Dishwasher Error Code DRAIN ERROR: Service Required
DRAIN ERROR - Service Required on a Hobart LXe dishwasher means the water level in the unit will not come up. The unit is locked out and allows nothing except power down; switch it off and call service.
High: the machine is locked out because the water level cannot be built.
- Code
- DRAIN ERROR - Service Required
- Maker
- Hobart
- Equipment
- Dish machines
- Applies to
- LXe Series
What does Hobart DRAIN ERROR - Service Required mean?
The control reads the water level as it fills and drains. When the level will not come up, it stops and shows DRAIN ERROR / Service Required (Service Phone Number). The message sounds like a drainage failure, but the manual defines it as a water level that will not rise, so the control sees the level wrong or the water is leaving as fast as it comes in. It allows power down only. That lock protects the pumps and heaters, which should not run dry. Its instruction is to switch off and call for service. A dishwasher operator can look for a drain that is left open or a standpipe that is out of place, but the level sensing and the valves are inside the machine. A technician can then see whether the level sensor, its tube, or the drain valve is responsible.
Affected models and control systems
Hobart LXe series: LXeC (ML-130191), LXeH (ML-130192), LXePR (ML-130193) and LXeR (ML-130194).
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
- DRAIN ERROR Service Required on the display
- Machine locked out and only allows power down
- Water level in the tank staying low
Possible causes
Likely causes — what usually sits behind DRAIN ERROR - Service Required on this control. A technician confirms which one it is before any part is replaced.
- Water level in the unit will not come up
- Drain valve not closing so water runs out as it fills
- Level sensor tube blocked or leaking
- Level sensor not reading correctly
- Inlet flow too low to build level
Safe checks before calling for service
- Power the machine down, as the manual says, and restart once.
- Check that no drain line or outlet is left open.
- Look for water leaking onto the floor beneath the machine.
- If the error comes back, note it and the service phone number for the call.
How a technician diagnoses DRAIN ERROR - Service Required
- Run the machine through a fill and watch the water level.
- Check the drain valve closes fully and does not leak by.
- Inspect the level sensor and its air tube for blockage or leaks.
- Check the supply flow rate.
- Replace the faulty part and confirm normal fill and drain.
- The drain valve and level circuit operate at machine voltage with water present.
- Telling a leaking drain from a sensor error takes watching the machine through a cycle.
How DRAIN ERROR - Service Required differs from similar codes
DRAIN ERROR means the level will not come up, whereas FILL ERROR means the fill timed out; both lock the machine.
Technical reference
- Maker documentation
- Hobart owner support
- Edition
- FORM 38435 (March 2014)
- Models / control
- LXe Series
- Section
- DIAGNOSTIC/ERROR MESSAGES (page 27)
- 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
Is DRAIN ERROR a clogged drain?
The manual defines it as the water level not coming up, so the cause can be a leaking drain valve or a level sensor problem.
Can I use the dishwasher?
No. It only allows power down until serviced.
Is it the same as FILL ERROR?
No. FILL ERROR is a fill time-out, while DRAIN ERROR is a level that will not rise.
Need help with Hobart DRAIN ERROR - Service Required?
A technician confirms the cause on site and gives you the price in writing before any work starts.