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Why is my Pump Buzzing

Most pool pumps are fairly straightforward in their operation. This allows us to easily identify problems if they come up. Some of the more common pump problems are a buzzing sound and a noisy motor. Below we discuss why these problems are occurring and how you can fix the pump issue.

Why is my pump buzzing & not running?

Firstly when a motor buzzes, it is vital that you do not allow it to run for too long. This could be an indication that the motor is overloaded.

If the pump is buzzing you should turn it off straight away before the motor burns out.

Usually, the capacitor has failed to result in the buzzing sound. The capacitor is what serves the motor power. Another cause of the buzzing is that the motor has seized.

We recommend getting your pump looked at through your local pool shop or pump service technician

Why is my pool pump motor noisy?

If pool pumps has become noisy when running it could have a tight bearing. Take a glimpse under the motor and look out for corrosion. The shaft seal may be leaking causing water to enter the motor resulting in a seized bearing.

Another cause could be debris binding the impeller. This is often due to debris going through a hole in the pump basket, so check and clean out both the skimmer and pump baskets.

You can check if the motor is free to turn by inserting a screwdriver through the rear end on the electric motor. There is a slot in the end of the shaft for this purpose. You should be able to rotate the shaft freely. If the shaft feels tight to turn, either bearings or debris will be the problem. Debris can be removed by dismantling the pump body and cover from the impellor (diffuser) and inspecting.

If the shaft is free to turn the motor capacitor is most likely the reason for the motor buzzing. The capacitor does get weak over time. Make sure the power is turned off and the plug removed from the powerpoint. The capacitor is located under a large cover on the motor or sometimes inside the terminal box depending on the brand of motor. There could be 2 or 3 wires going to the capacitor. You should mark these wires before disconnecting them. The capacitor is measured in microfarads (uF). The common value could be 20uF of 30uF or similar. You can get your capacitor tested and/or replaced at most electric motor rewind shops or more experienced pool shops.

If all the above has been discounted, the electric motor could be "short-circuited". Again this can be tested at the rewind shop or leading pool shops.

If the pump is old and is corroded you should seriously think about a replacement as safety can become an issue as well. At Direct Pool Supplies, we have all the latest models and well-known brands as well as ECO-friendly variable speed pool pumps available.

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