And as if by magic I've found a photo of the PCB from a Red Witch pedal after I had removed (most of) the solder.
What you can see is that without the solder there is no contact between the PCB hole and the switch pin.
This is not a good arrangement, especially as the use of the PCB connector and ribbon cable almost eliminates the possibility of a hard wiring option.
The cheap blue 3PDT switches used in most pedals are not very good quality and prone to failure.
They also don't like too much heat on the pins otherwise the red plastic around them melts.
This is a big problem with lead-free solder which melts at a higher temp than leaded solder.
Usually you are fine soldering the pins, but unsoldering is harder not to damage the switch.
Unsoldering the PCB here is a total pain, as not only do you have to remove all the solder to release the PCB, but the holes are through plated with tracks on both sides of the board. Unless you can remove all the solder then there is a good chance of pulling the through plating out, and now you have potentially a complicated repair (my guess that if you sent this back to the factory they would simply unsnap the ribbon connector and install another switch & PCB together).
Notice I've always said "unsoldering the PCB" and NOT "unsoldering the switch".
This is because it is the PCB that needs to be kept intact. If I damage the switch removing it, no problem they are cheap and easy to find (and I'm usually removing it because it's broken anyway).
If I damage the PCB, then you could be looking at a complicated repair.
