Restart after winter

can anyone help

There pumps put away last year, onay 2 will restart

All were used in the same greenhouse last year. All components appear to work - the solar panel, pump etc all tested in a working unit.

I’ve checked the contacts, primed it using a syringe running out of ideas now

Just bought a new unit and that seems stuck in night mode even after the glorious weather we’ve just had




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