Error Code: I90 Difficulty: Hard
Problem: Indicates a fault with the main Printed Circuit Board (PCB) or a communication error between electronic components. This could be due to wiring faults, damaged connectors, or a defective control board. It is also referred to as a checksum error on the MCF or CCF control board.
How to Fix I90 Error (Step-by-Step)
- Disconnect the dishwasher from power by turning off the circuit breaker or unplugging it from the wall outlet.
- Remove the outer door panel by unscrewing the screws, typically located on the inside edge of the door.
- Carefully detach the control panel to gain access to the main control board housing. Note the location of all wire harness connections before disconnecting them.
- Disconnect all wire harnesses from the old control board. They usually have locking tabs that need to be pressed to release.
- Remove the screws securing the old control board and carefully lift it out of its housing.
- Install the new main control board, secure it with the mounting screws, and reconnect all wire harnesses to their corresponding ports.
- Reassemble the control panel and the outer door panel, then restore power to the dishwasher to test its functionality.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
What to Check Next on This Electrolux Dishwasher
Focused repair path: dishwasher fill, drain, wash, heat, latch, sensor, and control checks. Do not treat the fault as reset-only if it keeps returning; use the failed function to choose the next test.
- Disconnect power before opening panels, then confirm whether the Electrolux dishwasher repeats the same code after a clean reset.
- Match the symptom to the part of the cycle or function that fails: fill, drain, heat, cool, spin, latch, ignite, fan, sensor, or control response.
- Inspect simple causes first: airflow, water supply, drain path, door closure, filter, venting, wiring connectors, and visible damage.
- Use meter testing or service diagnostics before replacing electronic controls, because wiring, switches, sensors, and loads can mimic board failure.
- Use the complete Electrolux dishwasher model number from the appliance tag before ordering any model-specific part.
Check, inspect, clean, test, measure, remove, reconnect, clear, and replace parts only when the symptom supports that path. If these checks point toward a part, verify the complete Electrolux model number from the appliance tag before ordering.
Recommended Parts to Check
No exact official OEM part number is listed here because the correct Electrolux dishwasher part can vary by complete model number. These are targeted part-category searches, not universal fit claims.
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Electrolux dishwasher drain pumpCommon replacement category: Drain pumpFit note: Exact OEM part number varies by complete Electrolux dishwasher model number. Confirm compatibility before buying.Why this category can matter: standing-water, drain, and incomplete-cycle symptoms after filter and hose checks.
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Electrolux dishwasher water inlet valveCommon replacement category: Water inlet valveFit note: Exact OEM part number varies by complete Electrolux dishwasher model number. Confirm compatibility before buying.Why this category can matter: fill or low-water symptoms after supply and float checks.
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Electrolux dishwasher control boardCommon replacement category: Electronic control boardFit note: Exact OEM part number varies by complete Electrolux dishwasher model number. Confirm compatibility before buying.Why this category can matter: repeating control faults after latch, wiring, and power checks.
Before ordering: match the part to the complete Electrolux dishwasher model number on the appliance tag.
When It’s Better to Replace Than Repair
Dishwasher repairs can add up quickly when the pump, control, heater, or leak-related parts fail.
Confirm cabinet width, water line, drain routing, electrical connection, and panel style before ordering.
For repair parts, verify exact fit with the full dishwasher model number before buying; these links are general replacement-appliance shopping options.
- [OK]Drain pump or circulation pump failure
- [OK]Leaking tub, door, or float-switch issues
- [OK]Heater or control failures on an older unit
- [OK]Repeated poor washing or drying performance
Recommended Dishwasher Replacement Options
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Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
More options (for a better recommendation)
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Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
Read Editorial Standards →Browse all Electrolux error codes: Electrolux Error Codes
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