Mira Galena

You will have to remove the flow valve to replace the solenoidsand it will also be easier to replace the latching switch when the flow valveis removed.

However i would always advise replacing the complete flowvalve which includes both the latching switch and solenoid.

The flow valve is the weakest component and I just feel whenyou have it out you may as well replace it

I think you may have a faulty Thermal Cut Out

A faulty TCO will have no continuity across the two terminals (The black thing on top of the heating tank)

Therefore a good TCO will have power at both connections and a faulty TCO will have power at only one.

(The function of the TCO is, if the water over heats it cuts the power off to the elements)