If the ESL4135 displays iC0 or iCo, Electrolux identifies an internal electronic communication fault, not a water or filter message. Confirm the visible symptom before resetting; filters, loading, detergent, water supply and door alignment are safe checks, internal wiring is not. The appliance controls are not exchanging valid information during startup or programme operation. Photograph the exact display because zero and letter O can look alike. iC0/iCo differs from inlet i10 and drain i20 messages. Cancel, switch the ESL4135 off, disconnect power for thirty seconds and restore it once. Do not remove the fascia or reseat internal connectors. If iC0/iCo returns, leave the dishwasher off and give the exact code and model to authorised Electrolux service.
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
The appliance controls are not exchanging valid information during startup or programme operation.
- 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
Cancel, switch the ESL4135 off, disconnect power for thirty seconds and restore it once. Do not remove the fascia or reseat internal connectors.
- Retest once and decide
If iC0/iCo returns, leave the dishwasher off and give the exact code and model to authorised Electrolux service.
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 ESL4135; the procedure here keeps only user-accessible checks.
Last checked: 30 August 2026