Glasses can chip in the ESF68020 when they touch each other, rest over rack pins or move under spray pressure. Confirm the visible symptom before resetting; filters, loading, detergent, water supply and door alignment are safe checks, internal wiring is not. Closely packed fragile items transmit vibration and contact forces; tall stems may also interfere with the rack or spray arm. Inspect before loading: pre-existing edge cracks can worsen in heat. A new repeated knock at one arm position indicates loading interference. Place dishwasher-safe glasses between—not over—rack pins, leave space between rims, secure stems in supports and turn both spray arms by hand before closing. Use a glass or gentle programme if documented. Stop using any cracked item; if an empty rack still knocks, request rack or spray-arm inspection.
Models covered
Safety first
- Cancel, switch off, close the water valve and let hot dishes cool. Wear gloves near the filter; never tilt a built-in appliance or remove its base or side panels.
What the symptom may indicate
Checks in the right order
- Confirm before acting
Closely packed fragile items transmit vibration and contact forces; tall stems may also interfere with the rack or spray arm.
- Make the appliance safe
Cancel, switch off, close the water valve and let hot dishes cool. Wear gloves near the filter; never tilt a built-in appliance or remove its base or side panels.
- Apply the official check
Place dishwasher-safe glasses between—not over—rack pins, leave space between rims, secure stems in supports and turn both spray arms by hand before closing.
- Retest once and decide
Use a glass or gentle programme if documented. Stop using any cracked item; if an empty rack still knocks, request rack or spray-arm inspection.
Stop and get qualified help when
- Stop for water in the base, an uncontrolled leak, heat or motor code, burning smell, damaged cable or a fault 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
- Electrolux — Electrolux's official support material documents this exact symptom path for ESF68020; the procedure here keeps only user-accessible checks.
Last checked: 30 August 2026