How to Test Hot Tub Pump

Are you having trouble getting your hot tub to flow? Keeping a healthy, properly functioning hot tub pump is essential for ensuring optimal water flow throughout the spa. Regularly testing your hot tub pump can alert you to any potential problems that are impacting its performance. 

How to Test Hot Tub Pump

If you’re unsure of how to test hot tub pump yourself, don’t worry! In this blog post, we’ll be discussing everything from what parts of the pump should be tested and how to diagnose issues with it, all the way up through strategies for repairing or replacing your existing unit – so let’s get started!

What Causes a Hot Tub Pump to Stop Working?

A hot tub pump is essential for operating a hot tub and keeping the water clean, circulated, and properly heated. But, like all mechanical devices, it can fail to operate correctly due to damage or improper maintenance. Understanding what can cause a hot tub pump to stop working can help you identify the issue quickly and get your hot tub back up and running.

The most common causes of a hot tub pump not working are blocked filter cartridges, faulty wiring, or seized bearings in the motor.

If you can hear the pump running, but there is no water flow, then it could be due to debris stuck in the impeller or blocked strainers.

Low voltage can also cause problems with your pump, so make sure to check the voltage of your hot tub pump. Additionally, a broken impeller or worn-out motor can both cause issues for your pump, so it’s important to make sure they are in good condition.

Finally, you should also check the temperature and pressure switches on your hot tub, as these can affect the functioning of the pump. If either is not working properly then it could be preventing your hot tub pump from operating correctly.

Understanding what can cause your pump to stop working, you can troubleshoot the issue and get back in the hot tub as soon as possible. If all else fails, you may need to call a professional for assistance.

10 Methods on How to Test Hot Tub Pump

1.  Check the Power Supply

The first thing you’ll need to do is to check the power supply to your hot tub pump. Make sure that the circuit breaker is turned on and that there is no tripped fuse. If the power is off, turn it on and see if the pump starts working. 

To Check the Power Supply

If not, you may need to replace the circuit breaker or reset the fuse. If the power is on and the pump is still not working, it may be due to a more complicated problem.  However, checking the power supply is a good place to start.

2.  Inspect the Electrical Cord

If the power is on and the pump still isn’t working, inspect the electrical cord for any damage. If you see any frayed wires or other damage, replace the cord. If no damage is visible, check the connection to ensure the cord is properly plugged in.

If not, plug it in. If that doesn’t resolve the issue, you may need to check the wiring for a faulty connection. If this is the case, hire a qualified electrician to diagnose and repair the issue. Try to avoid doing any wiring work yourself if you are not qualified, as this could result in serious injury or damage.

3.  Check for Obstructions

Next, check for any obstructions in the impeller, which is the part of the pump that moves water. Remove any debris that you find and see if that fixes the problem. If not, there may be a more serious issue with the pump.

You can also try taking off the pump lid and cleaning around the impeller area with a soft brush.

Make sure to turn off the power supply before taking the lid off, and be careful when putting it back on. Once you’ve checked for and removed any obstructions, turn the power back on and see if that fixes the issue.

4.  Inspect the Air Intake Valve

Can Also Check for Any Cracks

Another potential issue could be with the air intake valve. This valve allows air to enter the pump so that it can operate properly. Make sure that the valve is open and not blocked by anything. You can also check for any cracks or damage to the valve.

If there is an issue with the air intake valve, it could be preventing your pump from working correctly. If this is the case, you may need to replace your air intake valve with a new one. Try to find an exact replacement if possible, as this will ensure that your pump is operating correctly.

5.  Check for Leaks

Leaks are another common problem with hot tub pumps. Inspect all of the hoses and fittings to make sure that there are no leaks. If you find a leak, tighten or replace the affected part. If the leak persists, it could be a sign of more serious damage.

In this case, it’s best to consult a professional for advice and repairs. While you’re inspecting the hoses and fittings, make sure to check for clogs too. Remove any debris that might be blocking the flow of water.

6.  Clean or Replace the Filter

If your hot tub has a filter, make sure that it is clean and not clogged with debris. A clogged filter can cause all sorts of problems, including decreased water flow and reduced efficiency. If cleaning the filter doesn’t fix the problem, you may need to replace it altogether. Hot tub filters are relatively inexpensive and easy to find.

Make sure you use a filter that is compatible with your hot tub pump. Although most hot tub pumps come standard with a filter, some pumps may require an additional filter to operate properly. Be sure to check the manufacturer’s instructions before replacing the filter.

7.  Adjust the Water Level

If your hot tub doesn’t seem to be circulating enough water, it could be because the water level is too low. The water level should be at least halfway up the skimmer basket. If it’s lower than that, adjust it accordingly and see if that fixes the problem. 

Adjusting the Water Level

If the water level is too high, then it could cause the pump to work harder and may need to be adjusted. After adjusting the water level, check to see if the circulation has improved. Find the valve that controls the water level and check it for proper operations. If the valve is defective, replace it.

8.  Clean or Replace the Skimmer Basket

The skimmer basket catches debris as it circulates through your hot tub’s filtration system. If it becomes clogged, it can reduce water flow and cause all sorts of other problems. 

Clean out the basket regularly and replace it if necessary. However, be sure to check your owner’s manual for the proper maintenance information specific to your hot tub. Though the process may vary, most skimmer baskets can be easily removed and cleaned or replaced.

9.  Backwash or Cleanse Your Filter Regularly  

Cleanse Your Filter Regularly

Depending on how often you use your hot tub, you should backwash or cleanse your filter regularly according to the manufacturer’s instructions – typically once a month – to ensure peak performance from your filtration system and avoid strain on your circulation pump.

Not doing so will result in a drop in performance as well as an increase in wear and tear due to having to work harder than necessary.

While backwashing and cleaning filters can be easily done yourself, it is always best to get a professional to take care of this task if you don’t feel comfortable or have the right equipment to do it yourself.

This can be done with a garden hose and some cleaning detergent, or you may prefer to use a chemical cleaning kit.

10.  Run Regular Self-Diagnostics   

Many newer models of hot tubs come equipped with self-diagnostic features, which can help identify issues early on before they have a chance to cause major damage or become irreparable.

These features will typically run a series of tests automatically at regular intervals – usually once a week – and alert you if anything isn’t functioning correctly so you can take action accordingly.


If your hot tub isn’t functioning properly, there are a few things you can check before calling a technician. Testing the pump is one of them. With this guide, we hope we’ve given you the tools and information needed to test your own hot tub pump. 

We hope this guide on how to test hot tub pump was helpful. Please share it with your friends on social media if you find it useful. And be sure to check back here soon for more informative guides like this one.

Leave a Comment