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Upvc door lock won't unlock from one side

Hi there

I've recently moved into my new house and the UPVC Back Door looks a little old. The lock will operate just fine from the outside but will not turn from the inside! The handle works from both sides just fine and all 3 keys do the same thing. I've tried giving it a few sprays with WD-40 to see if that would help but still nothing...

Any ideas?

2 Answers from MyBuilder Window & Door Fitters

Best Answer

New cylinder (barrel) required by the sounds of it.


Answered 26th May 2014

It does sound like the cylinder is at fault, but it's normally the outside that can cause the problem as you can get a lot of debris in your lock from wind blowing muck in to your lock.


Answered 24th Nov 2015

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