Polaris booster pumps belong to the Zodiac Pool Systems pool and spa product line. The Polaris booster pump's original design is still utilized in its newest booster pumps. It is simply a design that works well. Pool booster pumps will all need repair after extended use, since machines and their parts wear out. Thankfully, because of how they are designed, a booster pump will give warning signs like leaks, unusual noises and erratic performance to let you know they need repairing. If your Polaris booster pump has reached that stage, try troubleshooting it to find and repair the problem.
Examine the pump closely to first locate the exact area of the leak, if the pump is leaking. Start at the pump shaft, and work your way out, examining carefully the area between the shaft and the seal, and then, the seal and the bracket.
Look at the area closest to the shaft itself first. Replace the two-part seal and shaft o-ring to stop this leak. Check the impeller seal housing and pocket. If you see any visual signs of damage, you more than likely have a circulation pump problem, as impeller pockets are damaged when the circulation pump runs dry.
Confirm that the circulation pump is properly functioning, and that it is timed correctly. Be sure both pumps only run at the same time.
Inspect the bracket next, if you do not find a leak at the area closest to the shaft. Take a very close-up look at the bracket itself first, looking for any cracks in it. Replace the bracket and all bracket seals, if cracks are found. If the bracket is not cracked, replace the bracket seals.
Check all pump line connections, if the leak is not detected at the shaft or in the bracket. Replace any discovered cracked hoses, and repair any loose or weak connections. Use silicone sealant to reseal any loose threaded connections, and be extra careful to start and re-tighten all couplings and connections straight.
Confirm first that the booster is getting water, if you see that the pump has little or no pressure, and that it has been correctly installed. Compare what you see with the hookup diagram that came with the pump, if you did not install it.
Examine the pump at the intake and outlet for any leaks. If the pump has an installed valve, make sure the valve is open and working properly. Inspect the impeller for debris. Make sure the discharge of the booster pump is not plumbed into a normal return line, but correctly plumbed into the dedicated cleaner line.
If the motor runs or hums but will not turn, try spinning the shaft with your hand; if it spins, you probably have an electrical problem.
Loud, screechy motors are asking for replacement.