Primary Problem - Interior light continuously on

I ordered a replacement light switch and read the corresponding instructions. I changed the light switch in minutes with a plastic untensil knife to release the internal clip on the right side of the switch. Simply moving the wires from the bad switch to the new one,pushing it back in place, and the job was complete. The entire job was done without any tools. The other part ordered was a refrigerator door shelf retainer that simply snapped in place.