When a pump is running normally (primed) the strainer basket is completely filled with water. It will make a quiet, consistent noise from water flowing. The motor will likely be quite hot while running. Modern electric motors will shut off before causing any damage to the pump. You should turn off your pump and allow it to cool before attempting any service. If a pump is primed and moving water, but making unusual noise it could be an issue with the motor, or the bearings in the motor. A leak in the pump’s shaft seal will allow water to enter the motor causing damage. This type of problem should be diagnosed and repaired by a professional service technician. Beechmount Pools repairs all makes and models of pool and spa pumps. A pump that is not priming could be related to several issues. If the pipe leading from the skimmer to the pump is filled with air, a pump will not start properly. As a temporary solution you can add water the pump strainer with a garden hose. Once the strainer area is filled with water the pump should start. If the lid on the strainer isn’t sealed properly, water will continue to drain back into the pool. Ensure the lid is intact and the gasket or o-ring is intact and seating well. As a permanent solution, a valve can be installed before the pump to prevent water from draining. If the strainer fills and holds water, but does not pump water, it is likely a clogged or damaged impeller. The impeller is attached directly the shaft of the motor. Any obstruction or damage will prevent the pump from moving water. Depending on the make and model of pump you may need to disassemble the wet end of the pump to check and clean this area. You should be able to spin the shaft by hand by turning the impeller. If the shaft will not turn, the pump needs to be serviced.