Fixing an issue with the GERDA cylinder
Can't insert or turn the key in your Gerda adjustable cylinder. Maybe you can sometimes but not always! You might have used the wrong brass piece inside the cylinder - either to small or to big.
If you can insert the key but it doesn't turn correctly, you might have inserted a smaller brass piece and need to go up in size.
If you can't always insert the key all the way, you have used a to big brass piece and need to go down one size.
See this video for help on how to disassemble and assemble the cylinder.
Need more help with your Danalock installation - see https://danalock.com