If your hot tub jets aren’t working, the problem can range from annoyingly simple to surprisingly technical. Whether your jets feel weak, are sputtering, or not turning on at all, the key is knowing what to check first so you can avoid unnecessary stress–or worse, unnecessary, expensive repairs.

Let’s walk through the most likely culprits and how to troubleshoot them.

Start with Basic Hot Tub Jet Troubleshooting

It’s always a good idea to start with some basic hot tub jet troubleshooting. Sometimes, it’s the simplest problems that cause the biggest issues.

Be sure to:

• Check the water level: If the water is too low, the pump can’t push water properly through the jets. Make sure the waterline sits just above the filter intake.
• Open the jets: Many hot tub jets rotate to control water flow. If they’re turned off or partially closed, you’ll get weak or no flow.
• Set the pump to high speed: Most spas run on a low-speed setting for filtration and a high-speed setting for jets. If your jets are weak, make sure the pump is set to the right mode.

Believe it or not, these few steps often solve many jet-related issues, so they should always be your first stop.

Rule Out Air in the System

If you had recently refilled your hot tub before the jets stopped working, you could be dealing with an airlock. This happens when air gets trapped in the plumbing, blocking water from circulating correctly, even if the pump sounds like it’s running.

To clear an airlock in your hot tub:

• Turn off the power.
• Loosen the pump union slightly to release the trapped air.
• Once you hear the hiss of escaping air and water starts to drip out, tighten it again.
• Restart the system and test the jets.

Some hot tubs have an air bleed valve that makes this easier, so check your manual to see what applies to your model.

Look for Signs of Clogged or Dirty Jets

If your hot tub jets are weak or uneven, or some are working while others aren’t, a buildup inside the jet housings could be the culprit. Now, it may not be the most glamorous job, but learning how to clean hot tub jets is a simple but powerful way to restore performance.

Here’s a quick cleaning process to follow:

• Remove and soak jet faces: Detach any removable jets and soak them in a 50/50 vinegar and warm water solution for 20–30 minutes to dissolve buildup.
• Scrub gently: Use a soft brush to clean around the nozzles and moving parts.
• Flush the plumbing: Add a jet or line cleaner to your hot tub, run the jets for 15–30 minutes, then drain and refill the spa.

Regular jet cleaning not only helps performance but also extends the life of your system, so don’t be tempted to skip it.

Know When It’s More Than a DIY Fix

If you’ve checked everything and your hot tub jets still aren’t working—or if the pump is noisy, overheating, or not kicking on—there may be a deeper issue. Electrical problems, a failing motor, or internal plumbing blockages often require professional tools and experience to fix.

That’s when it’s time to call the pros.

Clark Pools and Spas offers expert hot tub maintenance services, from diagnostics to deep cleaning and repairs. If your spa isn’t running like it should, contact our team today, and let us help you get things flowing again.