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Locksmith South Kensington had a call out for a MPL problem the other day and it did not go well. Got a call from a lady stating she had a UPVC back door that did not work!

Ok no problem I’ll come over and take a look and what the problem is, as I was not going to get a good idea over the phone what it could be. The lock cylinder seemed fine and the key turned 360 and allowed the key to be removed in the unlocked position.

But when the door was unlocked the handle just would not go down and release the mpl bolts, and allow the door to open.
I tried spreading the doors enough to allow access to the mpl bolts and used a blade tool to try and force the bolts up but they would just not shift.

I tried spreading the door enough to try and clear the bolts from the keeps but at this point the door was making some pretty scary creaking and cracking sounds and this was also a first time use for the spreaders for me!

Needless to say i could not get the door free and did not want to risk damaging the glass in the door as there were 12 small sections of glass. At this point I had to admit defeat and leave with my tail between my legs after not being able to do the job and more importantly not getting paid.

Now what I really need to know is my thinking on the right path as the gearbox was at fault? I did speak to the locksmith South Kensington team when I got back and they told me I should have snapped the cylinder and then I could have manipulated the lock (simulating the cam being thrown) and that would have allowed me to at least get the door open to allow access to the mpl.

It was something I had not thought of at the time and was not keen to start destroying locks when I was not really sure what the problem was.

I did not want to have to replace a cylinder and charge the customer for it only to find that it may of had nothing to do with the problem.
 
All comments welcome as I'm still way off on these systems and have not had hardly any work since I started out in June and experience is coming hard to come by.
Sometimes you can take door off hinges, depending on hinge, or adjust hinge to push door nearer frame this sometimes frees hook or mushrooms. You would be surprised how much spreading these doors take.

I may be wrong but perhaps a lock/cam problem as I would have thought that there should have been a little movement with handle if gearbox problem/door dropped etc. not a winder mechanism is it.

The first thing I would of done was remove the cylinder, you said the key turned so you had the key no need to snap, but you can pick the lock to align the cam for removal. Still not damaged anything yet. Locksmith South Kensington said we also would have removed the handles to see what was not connecting, it could of been a bad or worn spindle.

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