Douglas Machines Pot and Pan Washer Error Code Er03: Water Loss
Er03 means excessive water loss occurred during operation. Wipe up any water, check that the door closes fully and the drain valve is closed, and clean the level probe and float switch. Do not let the machine heat with little water in the tank, and call us if Er03 returns.
Medium: the machine stops to protect its heater, and a leak should be found before it is used again.
- Code
- Er03
- Maker
- Douglas Machines
- Equipment
- Pot & pan washers
- Applies to
- Digital touch pad 3125/5072 with PC board 3126/5071
What does Douglas Machines error code Er03 mean?
A Douglas pot and pan washer needs its wash tank full to work properly, and the heater must stay covered with water. During operation the control keeps watching the tank level. If the level falls further than the board allows while the machine is running, it stops and shows Er03. The tank may be losing water through the door, the drain, or a hose or fitting, or large containers may be holding water out of the tank, or the level probe may be reading low when the tank is not. A leak at the door seal is the most visible, since water reaches the floor. The risk the maker describes is real: heating with low water can damage the heater, which is why the control stops the machine instead of carrying on. Staff should look at the floor first. If water is on the floor, the leak is real and its source can often be found from outside. If the floor is dry, a dirty level probe or float switch is more likely, because grease and food film make them report low when the tank is full.
Affected models and control systems
Douglas Machines door-type pot, pan and utensil washers with the digital touch pad 3125 or 5072 and PC board 3126 or 5071.
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
- Er03 appears during a wash
- Water on the floor around the door or drain
- The tank looks low and the machine stops
- Large pots seem to trap water in the wash chamber
Possible causes
Listed in Douglas Machines's documentation
- Leak at the door seal or the drain
- Leaking hose or fitting
- Large containers holding water out of the tank
- Level probe reading low
Other likely causes — what usually sits behind error code Er03 on this control. A technician confirms which one it is before any part is replaced.
- A door gasket that has hardened and no longer seals along its bottom edge
- A drain valve seat worn so it weeps slowly during the wash
Safe checks before calling for service
- Look at the floor and wipe up any water.
- Check the door closes fully and the drain valve is closed.
- Clean the level probe and float switch.
- Do not let the machine heat with little water in the tank.
- If Er03 returns, call us and note where any water appears.
How a technician diagnoses error code Er03
- Confirm Er03 and run a cycle while watching the door, drain and fittings for leaks.
- Inspect the door gasket and latch pressure.
- Check the drain valve seat and every hose and fitting for seepage.
- Clean and test the level probe or float switch, and confirm the board reads the level correctly.
- Check that heater elements are covered before any heat is allowed.
- Repair the leak or sensor and run a full cycle.
- The water in the tank is hot, so finding a leak at the door or drain carries a scald risk.
- Telling a real leak from a dirty probe takes a watched cycle and a probe test.
- Heater elements must stay covered with water, or they can burn out.
Technical reference
- Document
- Douglas Machines Troubleshooting Guide (2024 edition), Touch Pad Error Code Value Table p.25
- Edition
- 2024 edition
- Models / control
- Digital touch pad 3125/5072 with PC board 3126/5071
- Section
- Troubleshooting - Error Code Value Table (PGM LED) printed pp. 14-15; Touch Pad Error Code Value Table printed p. 26
- 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 Douglas Machines pot & pan washer error codes
Why does the machine stop for water loss?
Heating with low water can damage the heater, so the control stops first.
Does water on the floor mean it is a leak?
Usually yes. A dry floor points more toward a dirty level probe.
Can big pots cause it?
The maker lists large containers holding water out of the tank, so check how the racks were loaded.
Need help with Douglas Machines error code Er03?
A technician confirms the cause on site and gives you the price in writing before any work starts.