Frigidaire · Dishwasher
Frigidaire Dishwasher i20 Error Code
Vent motor or drying fan circuit fault
What this error means
i20 on Frigidaire dishwashers indicates the vent motor or drying fan circuit failed—the control energized the vent assembly during the dry phase but did not detect proper operation. Dishes may finish wet when i20 appears.
How I20 is detected
When I20 appears on a Frigidaire dishwasher, the control board has confirmed that water did not leave the machine within the programmed drain window. On Frigidaire FGID2479SF, Frigidaire FDPH4316AS, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most I20 calls are resolved without parts: open dishwasher supply valve fully. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If I20 returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Vent fan motor seized from mineral buildup in the door vent housing
- Loose connector at the vent assembly on the inner door top
- Vent door linkage jammed preventing fan startup
- Control board relay failure on the vent fan circuit
Step-by-step fixes
- 1Inspect the top vent grille on the door for grease or plastic film blockage
- 2Open the inner door panel and confirm the vent fan blade spins freely by hand
- 3Reseat the vent fan harness at the door liner
- 4Run a High Temp cycle and note whether i20 appears only at the dry end
When to call a technician
Free fan blade with i20 every dry phase needs vent motor or vent assembly replacement.
Affected models
- Frigidaire FGIP2468UF
- Frigidaire FDPH4316AS
- Frigidaire FGID2479SF
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use dishwashers to prevent I20 from lint and food debris buildup.
- Record when I20 appears in the cycle and whether it clears after a 60-second power reset on your Frigidaire dishwasher—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for I20; Frigidaire uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting I20; reversed plugs on pumps and valves cause immediate repeat faults.