Is the outer casing hot after a short time it may be the capacitior some of the units have a venting nut which may need to be opened to release air in the pump but also allow the shaft to be rotated and started if it not air locked or faulty capacitor the in/out valves need to be checked.
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Is the outer casing hot after a short time it may be the capacitior some of the units have a venting nut which may need to be opened to release air in the pump but also allow the shaft to be rotated and started if it not air locked or faulty capacitor the in/out valves need to be checked.