Bill W Chesterfield , MO August 31, 2021 Appliance: Model WFW9200SAQ12 F20 error code on Whirlpool Duet Thanks to this site was able to trouble shoot to the water pressure sensor switch or water inlet valve and opted to start with the water inlet valve that fixed the problem. The videos were a tremendous help that cut the repair time in half even if only to avoid trips back to the tool box. The added feature to double check part compatibility before purchase / shipping is priceless! Shipping was as promised! Machine fixed! This site is second to none of other repair sites I have encountered. THANK YOU! 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes