Polaris PB4SQ Booster Pump Troubleshooting

If you are having problems with your Polaris PB4SQ Booster Pump, you are not alone. Many Polaris PB4SQ Booster Pump owners experience issues with their pool booster pump from time to time, and it can be frustrating to deal with these problems.

I have problems with my Polaris PB4SQ Booster Pump

Polaris PB4SQ Booster Pump Problems

Below are common issues and solutions for the Polaris PB4SQ Booster Pump:

The Polaris PB4SQ Booster Pump won’t turn on

Solution:

  • Ensure that there is power to the pump using a digital multimeter set on AC voltage. The power supplied to the pump must be within 10% of the nameplate voltage
  • Check the pump wiring and compare it to the supply voltage. If the pump is wired for 115VAC operation and the supply voltage is 230VAC it will damage the motor.
  • Check the capacitor. If the capacitor is bad replace it and try starting the pump.
  • Check the drive shaft by inserting a 1/4″ hex key through the center opening in the fan cover. If the drive shaft does not spin with ease, it may be seized and may need to be replaced.

The Polaris PB4SQ Booster Pump cleaning/circulating system is not operating correctly

Solution:

  • Verify that skimmer baskets, pump basket and other screens are clean. Clean as necessary.
  • Check filter and clean as necessary.
  • Check valve positions. Adjust as necessary.
  • NOTE Multiple pieces of equipment operating at one time (for example, waterfalls, spa jets, and surface returns) may prevent the cleaning system from working properly.
  • Check the cleaning system manually to ensure that the system is adjusted according to the manufacturer’s recommendations.

The Polaris PB4SQ Booster Pump Bubbles present in the filtration pump basket.

Solution:

  • Air in system. Check the pool or spa water level to ensure it is at the proper level and that air is not being drawn into the suction piping. If the water is at normal level, turn off the pump. Remove the lid and check for debris around the lid o-ring seat or improper installation of the lid seal (these conditions will cause air to leak into the system). Clean the lid o-ring and replace the lid. Hand-tighten the lid securely until it reaches the “locked” position (follow instructions on lid). Do not use any tools to tighten the lid. Turn the pump back on.

The Polaris PB4SQ Booster Pump Air leaks are still present.

Solution:

  • Check the suction side piping union. While the pump is running, try to tighten the union. If this does not stop the air leak, turn off the pump. Loosen both unions and slide the pump out of the way. Remove, clean and re-install both union o-rings on the filtration pump.
  • Reposition the pump next to the piping and secure the union nuts to the pump. With clean union o-rings, hand-tightening of the unions should create a seal. If the unions still do not seal, gently tighten with a large pair of tongue-and-groove
    pliers.
  • Do not over-tighten using a tool. Doing so will compromise the unions.

The Polaris PB4SQ Booster Pump is no air in the system, but the pressure is still low.

Solution:

  • It is possible that debris is caught in the pump impeller. The pump impeller moves the water, and the vanes in the impeller can become blocked with debris.

The Polaris PB4SQ Booster Pump is no air in the system, but the pressure is still low.

Solution:

  • It is possible that debris is caught in the pump impeller. The pump impeller moves the water, and the vanes in the impeller can become blocked with debris.

The Polaris PB4SQ Booster Pump is no debris blocking the impeller and the pressure is still low.

Solution:

  • The pump impeller is showing signs of normal wear. Have a qualified service technician check the impeller and replace as necessary.
  • Make sure that the first stage O ring is properly installed and is not pinched or damaged.
  • If the pump is part of a relatively new installation, it could be an electrical problem.
  • Contact a qualified service technician. Have the technician check for loose electrical connections and check the voltage at the pump motor while it is in operation. The voltage must be within 10% of the motor’s data plate rating. If the voltage is not within 10%, contact a qualified electrician and/or the local power service provider.
  • Pump seal is leaking air. Have a qualified service technician replace the seal.

The Polaris PB4SQ Booster Pump is leaking water between the motor and pump body.

Solution:

  • This is caused by a damaged or failed mechanical seal. Replace the seal.

The Polaris PB4SQ Booster Pump gets hot and shuts off periodically

Solution:

  • Ensure that there is adequate room around the motor to circulate air and keep the motor cool. Have a qualified electrician check for loose connections and check the voltage at the pump motor while it is in operation. The voltage must be within 10% of the motor’s data plate rating. If the voltage is not within 10%, contact a qualified electrician and/or the local power service provider.

Polaris PB4SQ Booster Pump Replacement Parts

How to Diagnose and Repair a Polaris PB4SQ Booster Pump

This guide will help you identify and resolve issues with your Polaris PB4SQ Booster Pump Pool Booster Pump.

Polaris PB4SQ Booster Pump Pool Booster Pump Troubleshooting

Share your Polaris PB4SQ Booster Pump Problems, issues , tips, ideas, and frustrations with other owners.

  1. Water jet out from pump housing! it is only less than 2 yrs old. I really double about the quality of the pump!

    Reply
  2. My pump ran fine for about 18 months. Now suddenly it will not turn on. Makes zero noise when the relay powers it up. I have 240V at the pump, wiring looks great, matches the Polaris manual exactly. I have replaced the capacitor. Pump & impeller both spin freely. I don’t know what else it could be.

    Reply

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