There is need to be careful when removing the old switch, and installing a new one. There is a white plastic gasket where one of the screws runs through it to secure the switch on its mounting plate. This gasket is small, about 3/16" diameter and 1/4" tall. It could be a challenge if you have large or buttery fingers. My fingers are neither "large" nor "buttery", but I dare say at times I was afraid the gasket may fall off my grip into the water softener. It took me several tries and patience (about 25-30 minutes) to install this switch. When installed with a new motor (I also purchased a new motor - the motor is much easier to install - no gaskets, only two screws and two wires to plug-in), my 26+ year-old Kenmore softener works as if "new"!