How Long Do Hot Tub Heaters Last?


The average lifespan of a hot tub heater is about 5 years.

However, this can vary depending on the quality of the heater, how often it’s used, and the type of water that’s being heated.

Mineral-rich water can be harder on a hot tub heater than distilled water, for example.

So if you have a lot of minerals in your water, your heater may not last as long as someone who has very soft water.

How Do You Know If Your Hot Tub Heater Is Bad?

There are a few ways you can tell if your hot tub heater is bad.

The first is if the water in your tub doesn’t seem to be as hot as it used to be.

Another way to tell is if you see any water around the heater or on the floor of your bathroom near the tub.

This could be a sign of a leak in the heating unit.

You should also check for any damage to the wiring or heating element itself.

If you see any cracks or corrosion, it’s likely time to replace your heater.

Finally, if your energy bills have been rising recently, that could be another sign that your heater is not operating as efficiently as it once was.

If you suspect your heater is bad, it’s best to consult a professional to diagnose the problem and recommend the best course of action.

How Much Does It Cost To Replace A Heater In A Hot Tub?

Depending on the heater model, it can cost anywhere from $50 to $200 to replace a hot tub heater.

A lot of that cost comes from having to hire a professional to do the job – unless you’re comfortable doing it yourself.

One thing to keep in mind is that most heaters have a lifespan of around 5 years, so if your heater is getting close to that age, it might be time to start budgeting for a replacement.

Why Do Hot Tub Heaters Fail?

As your hot tub heater ages, the heating element will slowly begin to deteriorate.

This process is gradual and typically goes unnoticed until the heater fails altogether.

Although you may not be able to see or feel the heating element deteriorating, this doesn’t mean that it isn’t happening. 

There are a few reasons why your hot tub heater may fail: 

  1. The most common reason for failure is corrosion of the heating element. Over time, the heating element will slowly corrode away until it eventually breaks down and can no longer heat up your water. 
  2. Another reason for failure is simply worn and tear on the heating element itself. Even with proper care, over time the heating element will slowly degrade and eventually fail. 
  3. Finally, hot tub heaters can also fail due to a power surge or other electrical issue. If there is a sudden spike in power, it can damage the heating element and cause it to fail.

How Can I Extend The Life Of My Hot Tub Heater?

The best way to extend the life of your hot tub heater is to have it professionally serviced every year.

This will help to ensure that any potential problems are caught early and don’t have a chance to cause serious damage.

Additionally, you should always follow the manufacturer’s instructions for the care and maintenance of your heater.

This includes things like using the correct type of water and not overloading the circuit breaker.

By taking these simple steps, you can help to prolong the life of your hot tub heater.

Can You Replace The Heater In A Hot Tub?

You can replace the heater on a hot tub, but it will likely be a costly and difficult undertaking.

Hot tubs are usually big and unwieldy, so hiring professional help may be your best bet.

Be sure to do your research beforehand to ensure you get the right kind of heater for your hot tub model.

With careful planning and execution, you should be able to replace your hot tub heater without too much trouble.


  • Jason

    Jason is an experienced writer, having contributed to many popular websites over the years. He currently writes for Big Hot Tub, a blog about everything hot tubs. When he's not writing or working on his blog, Jason enjoys spending time with his wife and two young children.