Robert W Lodi , WI December 08, 2014 Appliance: Whirlpool Washer GHW9400PW3 Whirlpool Washer Ghw9400pw3: Error code f 13 it would usually fail on whitest whites setting. How to replace Dispenser Switch. Replaced the dispenser motor/switch. now it works good.no more error codes Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes