There are two pressure switches listed in replacement parts. One (with a picture) is a complete pressure switch. The other is $20 cheaper,(no picture). What has failed (twice now) is the physical part of the pressure switch, in other words the air pressure valve connected to the tank that actually physically turns the electrical part of the switch on or off. This is removable, so I'm wondering if that is what they are talking about in the cheaper part. Without a picture, I cannot tell. Thanks
