[peters4n6]

6-year-old side-by-side fridge doesn't stay securely closed on fridge side. The magnetic "pull" of the gasket is super-weak. I inspected the gasket--I don't see any cracks or irregularities; it still looks brand new. Just to get out of the way-- there is nothing obstructing the door and the surfaces of the gasket and the metal frame of the fridge are clean. Could this be anything other than the gasket?

[peters4n6]

to add one thing---

Could the hinge be slightly loose and cause the door not to "spring closed"?

[denman]

Here are your parts
Replacement parts for WHIRLPOOL KSRS25ILSS03 Refrigerator | AppliancePartsPros.com

Check the door cams Item 26 in Section 1 and Item 10 in Section 10.

The door rides on the cams so that it is on a down slope of the cams when closed holding it shut.

Check that the gasket is not catching on the hinge side of the door.
A light coat of vaseline/ white grease on the frame here will prevent this.