My Coldseal DG back door has locked shut. The handle more or less turns around 360 degrees and the locking mechanism is engaged. How do I release the locking mechanism to enable me to open the door to change the lock?
The key still works as normal. I have taken the handle off and can see the square hole the bar passes through but it spins in its housing.
I have been offered an £80 call out plus an estimate of £600 for a new door which seems a bit steep.
Help please.