**Troubleshooting;** Remove the rear cover of the washing machine and check that the V-belt is properly tensioned. The start capacitor (10uF/400V) is intact. Use the direct start method to check that there is no local short circuit in the wash motor windings. Based on this analysis, there may be an issue with the timer or the wash switch. Using a screwdriver to short-circuit the switch, the washing function operates normally. Upon inspection, it was found that there were oxides at the contact points of the standard wash switch's copper plates, which increased the contact resistance and caused weak washing performance. Use fine sandpaper to polish the copper plates of the standard wash switch to remove the oxides. After checking, the contacts of the standard wash switch are good. Reinstall the rear cover of the washing machine, turn it on for testing, and the washing machine works normally, resolving the fault.
**Source of information:** Beijing Whirlpool Washing Machine Repair Phone Number, [http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3476390](http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3476390).
**Fault Analysis:** Based on the fault symptoms, it may be due to the loosening of the V-belt or a reduction in the capacity of the start capacitor in this washing machine.
**Whirlpool Washing Machine, Weak Washing Performance**