Euro lock spinning from one side

Is it spinning because there is a key in the other side ?

Mr. HandyAndy - Really

 

new cylinder

 

Yup......don't faff about, just replace it.

 

Sounds like it's broken. New cylinders are cheap enough and replacing them is quite easy.

 

Pay extra for an anti snap and bump cylinder.

 

This will help you make sure you get the right size cylinder, you could opt for a thumb turn, not sure whether it is a requirement for a main exit door?

 

Thumb turn cylinders ... easiest lock to bypass ..... avoid

 

...I've seen some list them like this example: 50x10x40. (in the above digram it would be 55x45)

Mr. HandyAndy - Really

 

The Tip of the Key could be worn and not engaging the Cam, go to www.grahamtowler.com locksmith downloads, there are two articles there that may help

 

Should be simples to take the lock out and give it a look-see, usually a cross-head screw by the lock holding the cylinder in place. Un do screw and remove lock.

 

You could buy a new cylinder incase it is broken and try it to see if it works. Then return it if you don't need it.