Think Crucial Replacement for Whirlpool Washing Machine Lid Switch, Compatible with Part # 3949238 EXTREMELY DURABLE so when you insert your # 3949238 lid switch into your Whirlpool washer it doesn't break or cause you to purchase anything extra. LONGER WASHER LIFE because without a working lid switch your washer may not work at all or even not stop working! When you open the lid of your washer it's much safer for the washer to turn off, without this, it may not! SIMPLE TO USE because once your new washer lid is installed all you have to do is open and close your washer to see if it's working. A broken lid switch could cause your washer to fill & agitates, but does not drain or spin. EASY TO INSTALL if you have experience working with washers. If not, don't worry! Your local appliance repair shop can do it for you! GUARANTEED SATISFACTION because of a 30 day full money bank guarantee and a trusted Think Crucial warranty. We are so confident in our products that we have no problem giving you every penny back if you're unhappy with your purchase. You won't see promises like that from big box brands!