Both my wife and myself have successful repairs. The issue that breaks these things is that the lock mechanism will stick so the handle is actually still locked after you hit unlock.

If you ever notice a delayed click or it takes two tries to open STOP and if you have to use another door for entry. It will be a lot easier to clean and lubricste a non broken door handle than replace or repair a broken one!

If you think the door is frozen in ice more likely the lock mechanism is frozen. Pull the handle while locked to learn what it feels like. It feels like a stiff spring because you are actually bending metal but no mechanical clink/thunk because no moving parts.

Just before I broke mine I noticed up to a 1 second delay in the unlock mechanism especially when cold temps. If you hear a soft click with any delay at all after remote unlock progress slow