7 Troubleshooting Tips for a Swimming Pool Pump That Doesn't Work (2023)

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If you have a problem with your pool pump, you might be able to fix it yourself. Here are some common pool pump problems, how to troubleshoot them, and how to fix them.

swimming pool pump anatomy

7 Troubleshooting Tips for a Swimming Pool Pump That Doesn't Work (1)

  • low pump:Made from the same material as the bulletproof windows, the lid allows you to check the state of the filtration system. If you see air bubbles or no water when the pump is running, there may be an air leak on the suction side of the pool or the cover gasket.
  • Sihus com route:Water enters here first and collects dirt before reaching the drivetrain.
  • bottom plug:Used to deflate the pump during winter installation. More than one drain plug can be fitted to the pump.
  • Pump body with impeller:This is the main control center where the impeller, diffuser and seals work. The impeller turns the motor shaft, which pumps pool water into the filter.
  • Swimming pool pump motor and shaft:Its only task is to turn the rotor.

1. Pool pump does not turn on or off during operation.

  • If the pump fails to start OR shuts down quickly after startingit's probably an electrical problem. Check the switch box for blown fuses. Then check the connections to make sure nothing is loose or damaged. If you don't know what you're doing, hire a qualified electrician.
  • If the engine overheats and stalls after startingit could be an overloaded circuit - so make sure you have the correct voltage for your pump. Also check the motor openings to make sure nothing is blocking the fan.
  • If the pool pump motor shaft does not turn, check that the motor is not dirty.
  • If the pump turns on but does not run at full speed and humming sounds are heardcheck the capacitor. The capacitor turns on the pump with an electrical impulse. This is one of the parts that is best replaced by a professional.

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2. Pool pump is working but water flow is low.

This means that the pump must be primedbecause something interrupted its suction or water flow. It could be something blocking, a dirty pool filter, or too much air in the system.

  • If something is blocking the pump's suction, check the filter indicator. If it is 10 psi above the normal reading, clean the filter. This will reduce the pressure and reset the pump flow. Then check that the pump basket and impeller are not dirty.
  • If there is air in the systemlikely going through a skimmer or a leaking O-ring. Make sure the water level in the pool is not too low and check the skimmer basket for debris. It may be necessary to fill the filter basket with water and close it again. learn more abouthow to fix air in pool pump.
  • Eventually you will probably have toprime the pumpfor it to start again. Watch the video below.

3. The pool pump is leaking.

If you have a leaking pump, look for seals that need replacing. Check O-rings in impeller housing, thread seal or shaft seal.

  • To check for leaks, bend O-rings and look for cracks.
  • If you notice any cracks, the O-ring has dried out and needs to be replaced.
  • If you don't find any cracks, simply apply gasket lubricant to help create a better seal and extend gasket life. You can also be quite liberal with the grease. Don't be shy 😉

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7 Troubleshooting Tips for a Swimming Pool Pump That Doesn't Work (3)

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Use it liberally on all rubber rings for a stronger seal and will make them last longer!

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4. The pump sucks in air.

This can happen for several reasons:

  • Loose pump cover
  • bomb break
  • Defective thread seal
  • Damaged O-rings and seals
  • Air leak in suction line
  • Valve stem leak
  • OR a problem with the water system on the suction side of the pump.

Look for cracks, leaks or broken connections and replace the part. Check out our article ondeflate the pool pump.

Can't find an air leak in your pool pump?

Spread shaving cream on possible problem areas. If there is leakage, it will absorb the shaving cream and leave a dimple.

7 Troubleshooting Tips for a Swimming Pool Pump That Doesn't Work (4)

As always, if you don't feel comfortable replacing a part, get in touch with an expert.

5. Pump makes noise.

If the motor is really noisy, the pool pump may just need better water flow. Remove any obstructions from the hydraulic lines and check for air leaks.

However, if the motor makes a loud noise, the pump may have damaged the bearings.

Of course, we recommend calling a professional to disassemble the motor and replace the bearings. But you can also try starting the pump by gently tapping the engine with a rubber mallet or the soft sole of your shoe. Sometimes this can help. But be careful.

6. Pump basket not filled with water.

The pump may be sucking in air or the strainer or pump basket may be clogged.

  1. Clean filter and pump basket
  2. Check the water level in the skimmer. If it's low, it could indicate an air problem.
  3. Then use the shaving cream test to check for other air leaks.

7. Pool pump hums and won't turn on.

First check that the impeller is not blocked by debris.. Turn off the pump and remove the pump casing bolts. Remove pump assembly and remove all impeller seals. Then remove any visible debris and reassemble the pump.

If you hear a buzzing or buzzingcomes from the pump motor. This means that power is getting to the engine, but there are problems starting it. It could be a damaged capacitor, centrifugal switch or rust in the motor. It could also mean that the impeller is stuck.

3 signs your pool pump is dying

A well-made pool pump should last around 8 to 10 years with proper maintenance. But how do you know when the pump is low?

1. Filter is permanently low PSI.

If the pressure gauge on the filter is below normal, the cause could be a clogged skimmer basket or pump filter. However, if the situation persists even when everything is clean, then the impeller could be worn out.

2. The pool pump constantly leaks.

If you've done everything you can to fix the pump leak, but it still leaks regularly, the motor shaft seal may be worn out. The good news is that it can be replaced inexpensively without having to buy a whole new pool pump.

But if you've tried everything you know and you still drip water from the pump even when it's off, it's a sign that the motor shaft seal is worn out.

3. Pool pump always loses prime.

Of course, if the problem has been fixed correctly, you may still have trouble keeping the pump full. It could be broken parts or just time for a new pump. Here is our complete guide.find the best new pool pump.

Finally, if you're still having trouble or don't feel confident doing something yourself, call in a professional. And if your pump is constantly leaking, losing suction, or if your filter pressure gauge is low, it may be time to buy a new pool pump.

7 Troubleshooting Tips for a Swimming Pool Pump That Doesn't Work (5)

Matt Giovanisci is the founder of Swim University® and has been in the pool and spa industry since 1995. Since then, his mission has been to make pool and spa care easier for everyone. He continues to help more people with water chemistry, cleaning, and troubleshooting every year.


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