Before doing work on your pump disconnect the power and shut off both the inlet and outlet pipes. Have something ready to collect water because there will be water stored in the pump.
If the pump is not coming on at all on its own make sure there is power going to the pump. A breaker may have tripped if too many things were running at the same time from shared or common outlets. If there is power and you press the manual start switch/button on top the smart head, the pump may come on. If you still do not get any water being pushed, there is probably air in the pump. This manual button must be used sparingly, it runs the motor even if there is no water in it.
Make sure there is no air in the pump. If there is a bleed screw, open it very slowly until either only water or bubbles comes out. When you see this stop opening and wait until only water comes out. Ideally you should have a union on the inlet and outlet pipes close to the pump so it can be removed easily. Instead of the bleed screw you can open the union a couple turns to let air out as if you are using it as the bleed screw until only water comes out. Get ready to collect water coming out of the union. Try the pump again to see if that was the problem.
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