GE Dishwasher Error Code i20: Drain Pump Electrical Fault
Updated: February 2026
The GE dishwasher error code i20 (or I20) signals an electrical fault in the drain pump circuit. Unlike codes indicating mechanical pump failure, i20 specifically points to electrical problems preventing the pump from operating correctly.
Understanding i20
The drain pump circuit includes the pump motor, motor wiring, and the control board relay or triac that switches pump power. The i20 error indicates short circuits, open circuits, excessive current draw, or control board problems that prevent proper pump operation. The pump may be mechanically fine but can't receive or properly use electrical power.
Electrical Troubleshooting
- Step 1: Disconnect power completely before any electrical testing. Turn off the circuit breaker and unplug if possible.
- Step 2: Access the drain pump from beneath the dishwasher. Remove the kickplate and lower access panel.
- Step 3: Inspect all wiring to the drain pump for obvious damage—melted insulation, cuts, or pinches. Pay special attention to areas where wires pass through metal edges.
- Step 4: Disconnect the pump motor electrical connector. Use a multimeter to test pump motor resistance—typically 40-60 ohms for most drain pump motors.
- Step 5: Test for shorts to ground. Touch one multimeter probe to a motor terminal, the other to the pump housing. Infinite resistance is correct; any continuity indicates a short circuit.
- Step 6: Check the wiring harness from pump to control board. Look for burned or corroded terminals, loose connections, or damaged wire insulation.
- Step 7: If pump and wiring test good, suspect control board issues. The relay or triac controlling pump power may be faulty, requiring control board replacement.
Repair or replace any damaged wiring using proper wire connectors and heat shrink tubing. If the pump motor shows short or open circuits, replace it. After repairs, restore power and run a drain test cycle. The i20 error should clear once the pump circuit operates correctly. Electrical faults are dangerous—if you're uncomfortable with electrical diagnosis and repair, consult a professional technician. Never operate the dishwasher with damaged wiring or electrical faults.
Key Takeaway: With the information in this guide about GE Dishwasher Error Code i20: Drain Pump Electrical Fault, you are well-prepared to handle this topic confidently. Remember to start with the basics and work your way up if needed.
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