How do I Fix My Pool Pump Motor?

Swimming pool pump motors are the heart and soul of your swimming pool. If the motor on your pool pump fails everything halts. There is not any water circulation, chemicals are not being spread, the pool is not being cleaned, and any accessories or water features you have cannot be utilized. Below we will discuss how to diagnose pool pump motors and prevent costly pool repairs.

Let’s discuss what is wrong with your pool pump motor if the pump is humming.If your pool pump is humming then one of the following problems have occurred 1) the pump impeller has an stoppage 2) the motor capacitor has failed 3) the motor bearings are frozen solid holding the motor shaft 4) there is a bad motor start winding.

Problem one: the pump impeller has an obstruction. First, turn the power off to the pool equipment. Second, take the pump housing apart by removing the housing bolts or housing clamp. Third, remove the pumps impeller diffuser by pulling the diffuser loose or unbolting it’s fasteners. Now when removing the impeller diffuser the obstruction should fallen out or be obvious. If no obstruction was noticed then spin the pump impeller by hand. The impeller should spin freely without a grinding noise and should not wobble. If the impeller wobbles then it could be warped from heat or the impeller has failed. If necessary replace the impeller, diffuser, and shaft seal.

Problem two: the pump motor capacitor has failed. The easiest way to check this is to turn off the pool equipment’s power and remove the capacitor from the motor while being careful not to cross the posts on the capacitor or touch the posts to anything including yourself. Capacitors store power so when the motor is switched it sends that boost of power to turn the motor shaft. Now with the capacitor removed from the motor you can discharge the capacitor with a screwdriver by crossing the two posts on the capacitor.

Warning: if the capacitor discharges it is very violent spark. Often times it will ruin the screwdriver. So make sure to use a bd screwdriver with an insulated cover and wear eye protection.

Now that the capacitor is discharged you can match a new capacitor to it and install the new capacitor with the equipment’s power off. Replace the cover for the capacitor and turn on the pool equipment’s power. Now the motor should start and run normally if this is what was wrong with your pump motor.

Problem three: the pump motor bearings have frozen solid and is holding the motor shaft still. A grinding noise is also present when the motor bearings have failed. At this point you will need the pool pump motor replaced. Some pool companies can reconstruct pool pump motors. The best way is getting a new pool pump motor from the Internet. You can get a new motor with a full warranty (1 year) at a great price.

Problem four: the pool pump motor has bad start windings. When this problem occurs the three prior problems have checked out. Sometimes even though the impeller and diffuser have checked out they can stil be warped when assembled. Double check this step. If this still checks out then replace your pool pump motor. 

So by the end of these steps you should know if you can repair or replace your pool pump motor. Whenever there is doubt don’t be afraid to call a pool technician to come diagnose your pump motor.

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