Electrolux Washer Extractor Error Code 28: CPU/DLCU Low Levels
Error code 28 means the mechanical level monitor in the DLCU disagrees with the electronic level check. The monitor was not on when water was above the nominal value, or not off when it was below. A technician should check the level controller, its cables and the hoses.
Medium: the machine stops because its two level checks disagree, but the cause is usually hoses or the level controller.
- Code
- Error code 28
- Equipment
- Industrial laundry
- Applies to
- Electrolux washer-extractors W465H-W4300H, W475S-W4330S, W475N-W4330N (Type W3..., Compass Control)
What does Electrolux Professional error code 28 mean?
Two systems watch the water level at the same time. The CPU board checks it electronically, and the DLCU has a mechanical level monitor as a second opinion. If the two disagree, the board shows ERROR 028 / CPU/DLCU LOW LEVELS. The manual describes two forms of disagreement: the monitor is not on when the water is above the nominal value, or it is not off when the water is below. The manual gives the technician exact figures: the level controller switches on at 40 mm and off at 15 mm Wg, and the voltage across it should be 0 V below 15 mm Wg and 5 V above 40 mm Wg. The causes listed are a damaged level controller, cross talk in the level controller electrics, leaking air hoses and an incorrect nominal value. The hoses are blown clean as part of the checks.
Affected models and control systems
Electrolux washer-extractors W465H-W4300H, W475S-W4330S and W475N-W4330N, Type W3..., with the Compass Control. The code compares the DLCU mechanical level monitor with the electronic level check.
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
- Display shows ERROR 028 / CPU/DLCU LOW LEVELS
- Program stops at a fill or drain step
- Water level looks right
- Message appears at the same step each time
Possible causes
Listed in Electrolux Professional's documentation
- Damaged level controller
- Cross talk in level controller electrics
- Leaking air hoses
- Incorrect nominal value
Other likely causes — what usually sits behind error code 28 on this control. A technician confirms which one it is before any part is replaced.
- Hose slipped off its connector after service
- Moisture in the level controller connector
- Nominal value changed in the settings
Safe checks before calling for service
- Look at the water level in the drum when the message appears and note it.
- Switch the machine off and on once.
- Do not pull on the hoses behind the machine.
- Write down the step of the program and call us.
How a technician diagnoses error code 28
- Read the code and note the program step.
- Check level controller function: switch-on 40 mm and switch-off 15 mm Wg.
- Measure the voltage across it: 0 V below 15 mm Wg and 5 V above 40 mm Wg.
- Check cables and blow the hoses clean.
- Check the nominal value in the settings.
- Voltage readings across the level controller require a meter on the control side.
- Checking the nominal value needs the service program.
- Leaks in air hoses are found with pressure tests.
How error code 28 differs from similar codes
Code 28 is a disagreement between the mechanical monitor and the electronic check; code 53 is the monitor not off at program start or end.
Technical reference
- Document
- Service manual, Washer extractors W465H-W4300H, W475S-W4330S, W475N-W4330N, Type W3..., Compass Control
- Maker documentation
- Electrolux Professional owner support
- Edition
- 438 9228-61/EN, 2011.08.25
- Models / control
- Electrolux washer-extractors W465H-W4300H, W475S-W4330S, W475N-W4330N (Type W3..., Compass Control)
- Section
- Troubleshooting, printed p.123
- 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 Electrolux Professional industrial laundry error codes
What do 40 mm and 15 mm Wg mean?
They are the switch-on and switch-off levels the manual gives for the level controller.
Is the electronic level wrong?
Either may be wrong. The code says they disagree.
What voltages should I expect?
0 V below 15 mm Wg and 5 V above 40 mm Wg, per the manual.
Need help with Electrolux Professional error code 28?
A technician confirms the cause on site and gives you the price in writing before any work starts.