How old is the unit? If it is new then double check you have the unit wired and set up for the correct incoming line voltage. If it is older you will need to look into the motor for damage in the electrical or mechanical portion. A local lectric motor repair shop could help you if you are not sure how to inspect the motor.
You should also double check the pump end has not become clogged with debris in the suction.
Answers & Comments
How old is the unit? If it is new then double check you have the unit wired and set up for the correct incoming line voltage. If it is older you will need to look into the motor for damage in the electrical or mechanical portion. A local lectric motor repair shop could help you if you are not sure how to inspect the motor.
You should also double check the pump end has not become clogged with debris in the suction.