Door lock questions


Hi all,
My back door lock 'died' in the locked position yesterday. It's a upvc double glazed door, and the only i.d. I can see on the hardware is the name FUHR and the figures 3/89, which looks like a date, but it's been in since 1985. I've got it out with difficulty, and now it's working after a fashion, but it will obviously have to go. It's a mortice type lock with long extensions/sliders that go all the way to the top and bottom of the door. It's the type where you press the handle down to open, lift it up to enable key locking. The handle returns by a spring to the central position in either case.
Questions -
Do I need to know the door manufacturer to specify the lock? (I don't) :-((
What dimensions/specifications will I need to know to make sure I get the right one, assuming it is available?
And of course, where will I get it?
TIA .Steve
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I took my old one to them and they matched it. Cost 50.00. This was in my locality I think they have them spread over the country Regards JD

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Hi - are we talking the latch mechanism or the lock cylinder itself which has failed? A lot of upvc doors have a FUHR latch mechanism, but the lock itself may be what is known as a euro cylinder.
If it IS a failed euro cylinder, then these are readily available from locksmiths and hardware stores. The only measurement you need is the length of the cylinder and its a 5 min job to swap one (a case of undoing a single machine screw in the door edge, and rotating the key till its latch is within the body of the cylinder, and it can then be slid out from either front or back).
Go to www.screwfix.com and search on "euro cylinder" to see what one looks like, and the lengths available.
HTH Midge.

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Thanks to both of you. It is the latch mechanism. I'll be getting on it, but this weekend has been trashed for other reasons.
Steve
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