This doorknob when locked spins either direction without opening. When unlocked, it used to work like a normal doorknob but now will only turn counterclockwise. Is there an easy way to fix this so it can again be turned either way to open the door?
If it would previously turn either direction and now does not , this is indicative of either something physically blocking the mechanism inside or needing lubricant. Either way your solution is the same- disassemble and lubricate. Remove the knobs, then remove the latch assembly. Remove any obvious pieces of metal or debris that are present, add a lubricant, work the mechanism, and reassemble.