Hi John,
Latches have a return spring for returning a lever when the locking rods are unlocked. Quite often this spring breaks and the lever does not return the lever to the unlocked position.
Get a new lactch and note where the return spring is attached to and at the door latch, move the lever to the unlocked position and you should be able to unlock.
For some models the return spring is concealed and you would have to break the plastic housing inside the latch to release the lock.
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Sunday, September 26th, 2010 AT 12:02 PM