F06 is a door lock error
the door lock closes but the machine does not know
and yes dampness may be a problem
fault list as
Check for water leaks that may affect connectors J004 (collector)
or J11 (three-phase) causing the relative contacts to short;
– Check the door lock terminal board (possible problems due to
aggression caused by manufacturing chemical residues that
may cause short circuits);
– Check J004/door lock wiring;
– Replace door lock;
– Replace PCB.
Dave