I am experiencing a weird problem with one of the zone (zone 1, that is).
It does not open in either manual mode or auto mode.
However, I discovered that if I leave zone 1 in manual open mode,
and when zone 2 is open in auto mode, both 1 and 2 open.
The controller is a fairly old 2-wheel type controller and I never had
any problem with it before.
Any suggestions, guesses as to what's going on?