Mark H League City , TX September 18, 2017 Appliance: Model WD21X10224 Blinking lights beep once per minute Replaced the switch interlock Part Number WD21X10224 (AP3872949) replaces 1168295, AH1021382, EA1021382, PS1021382. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes