i40Frigidaire Dishwasher — Frigidaire Dishwasher i40 Error Code

The i40 code means the dishwasher's control board detected that the tub did not fill to the required level within the allotted time. Causes include the household water supply valve not fully open, a kinked water supply hose, a clogged inlet screen on the water inlet valve, or a failed water inlet valve solenoid (part 154222603) that is not opening fully. A very low household water pressure (below 20 psi) can also trigger i40. On new installations, a closed shut-off valve under the sink is the most common cause.

Check that the water supply valve under the sink is fully open. Inspect the water supply hose for kinks. Remove the inlet valve at the back of the dishwasher and clean the small mesh screen on the inlet port — sediment buildup here restricts flow enough to trigger i40. Test the inlet valve solenoid with a multimeter for continuity. If the screen is clean and the solenoid tests failed (OL), replace the water inlet valve (154222603).