How to Repair a Hot Tub Blower

Nothing ruins a relaxing evening like discovering your hot tub blower isn’t working. If your jets are quiet and your bubbles have vanished, don’t panic. In many cases, replacing a hot tub blower is a manageable DIY task—as long as it’s done with safety in mind.

Before you grab your tools, let’s start with the most important rule of hot tub maintenance.

Electricity and Water Do Not Mix

It’s absolutely essential to ensure that no water enters your hot tub air blower. If water reaches the blower’s internal components, it can trip your circuit breaker—or worse, lead to electrical hazards.

So, before beginning any repair or replacement work:

• Disconnect power at the breaker.
• Unplug any electrical components and ensure nothing is live.
• Only proceed if you’re confident in handling electrical equipment safely.

How to Replace a Hot Tub Blower

1. Locate the Blower

Finding your hot tub blower might take a moment. While it varies by model, the blower is typically located near the pump. It’s smaller than the pump, and unlike the cylindrical filter, the blower is generally more compact and tucked into your equipment bay.

You’ll also likely spot a check valve near the blower—this device prevents water from flowing back into the blower.

2. Disconnect the Air Lines

Once you’ve found the blower:

• Remove the air lines. These are typically attached using either jubilee clips (hose clamps) or threaded connectors.
• Set the connections aside for reuse later.

3. Disconnect the Power from the Spa Pack

• Open your Spa Pack (the control unit that powers your blower, jets, and heater).
• Double-check that power is fully turned off at the mains.
• Locate the blower’s connector—often an AMP plug or clip—and carefully disconnect it.

Once these steps are complete, the blower can be removed entirely.

4. Check the Blower Specifications

Before buying a replacement, inspect the labels and power rating on the old blower. Make sure your new unit matches the required voltage (usually 110V or 230V) and power (e.g., 900W or 1-2HP) to ensure compatibility.

Installing the New Blower

Now, it’s time to reverse the process:

• Connect the new blower to the Spa Pack using the appropriate electrical connector.
• Carefully close the Spa Pack, ensuring no cables are pinched or disturbed.
• Reattach the air lines using the same clips or fittings.
• Confirm the check valve is secure and correctly positioned.

Power On and Test

Once everything is reconnected:

1. Turn the power back on at the mains.
2. Activate the hot tub from your topside control panel.
3. Turn on the jets and then the air blower.
4. Let the system run for a few minutes and observe for leaks or malfunctions.

If all goes smoothly, congratulations—you’re back in action and ready to soak!

Final Thoughts

Replacing a hot tub blower isn’t just a cost-effective alternative to calling a technician—it’s also a great way to get to know your spa system better. As always, safety should come first. If you’re unsure at any point, consult a professional.

Thanks for reading, and happy hot tubbin’!

If you’re new here, then don’t forget to check out my other blogs here or my youtube channel here. I post very frequently and a couple of months following me and you’ll be a semi DIY hot tub pro yourself!

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Thanks - Andi

 

Hi, Andi here. I own Buildahottub.com and also write all of the articles and info pages on the site. Some years back now, I built my own hot tub but struggled to find the information I needed. So, once my tub was complete, I started this website to help others in their own pursuit of hot tub and plunge pools DIY building information.

Fast forward to 2025, I've helped over 1400+ DIY customers just like you all over the world build hot tubs and pools. Have a good look around the site, there are lots of resources here. Please do get in touch if I can help you. - Cheers, Andi