Debris lodged inside a locking cylinder can obstruct internal movement, keeping a properly inserted key from rotating the way it should. Continued pressure against that

Damaged components inside the cylinder can block the movement a locking mechanism needs to rotate normally. Forcing movement out of a resistant cylinder can put

A key that enters easily but turns poorly can point to developing mechanical problems within the lock, or to deterioration affecting the key itself. Repeated

Excessive wear can change a key’s shape just enough to interfere with proper engagement while still letting it enter the lock. Straining a key that

A key that goes into the lock normally but won’t rotate often points to internal contamination, component wear, cylinder damage, or deterioration of the key

Damaged or deteriorating cylinder components can make an inserted key meet resistance instead of turning freely. Excessive turning pressure applied against that resistance can damage

Taking time to diagnose a lock accurately makes sure the specific condition behind the malfunction gets the right attention rather than a guess. The key

Foreign material building up inside a lock can interfere with how the components move, keeping an otherwise well-fitting key from rotating. A key that won’t

Mechanical damage can throw off how the key and internal components interact, so the key goes in fine but won’t turn. Extra force applied to

A key can go all the way into the cylinder and still barely move, especially once internal parts have started wearing down or taking damage.