bE on LDT7808SS can be triggered by hand-dish soap, excess detergent or an appliance that is not level; it is not automatically a motor failure. Use the exact code to separate water inlet, drainage, foam, leak protection and internal faults. Do not order a part until the visible installation and removable filters have been checked. Stable foam confuses water movement sensing, while a tilted tub changes the load seen by the wash motor. Look for persistent foam after draining and check level front-to-back/side-to-side; no foam and correct level makes service more likely. Cancel and drain, remove dishes, run repeated rinse-only cycles without detergent until foam disappears, and correct levelling only through the accessible feet per installation instructions. Use automatic-dishwasher detergent at the measured dose and test one empty cycle. A foam-free, level machine that repeats bE needs LG service.
Models covered
Safety first
- Wear gloves around the sump because broken glass may be hidden. Do not tilt a built-in appliance or remove its base, side panels or wiring cover.
What the symptom may indicate
Checks in the right order
- Confirm the pattern
Stable foam confuses water movement sensing, while a tilted tub changes the load seen by the wash motor.
- Prepare safely
Cancel the cycle, switch the dishwasher off, close the water valve and wait for hot water and dishes to cool before touching a filter or hose.
- Apply the official check
Cancel and drain, remove dishes, run repeated rinse-only cycles without detergent until foam disappears, and correct levelling only through the accessible feet per installation instructions.
- Retest once
Use automatic-dishwasher detergent at the measured dose and test one empty cycle. A foam-free, level machine that repeats bE needs LG service.
Stop and get qualified help when
- Stop and arrange service for water in the base, a heat or motor code, a leak that continues with the valve closed, or a code that returns after one empty test.
Next step
Repair, replace a part, or arrange a diagnosis?
Use the checks and stop conditions above to choose a cautious next step. A symptom alone never proves that the appliance has failed.
Resolve it without buying anything
Complete the 4 user-accessible checks in order. If normal operation returns and no warning sign remains, no replacement is indicated.
Replace only the confirmed part
If the checks isolate a worn or blocked component, match its complete reference to the exact appliance model before ordering.
This guide does not identify a replacement part. Do not order a generic component from the symptom alone.
Arrange a diagnosis before replacing the appliance
Stop at any warning sign listed above. A qualified diagnosis should confirm that repair is unsafe, unavailable or uneconomical before an appliance replacement is considered.
Sources used
- LG — LG's official material documents “LG LDT7808SS bE error: excess foam or poor levelling” and the user checks retained here.
Last checked: 30 August 2026