Hot Tub Heater Replacement Guide – Quick & Easy

Are you experiencing issues with your hot tub heater, or simply looking to upgrade to a more efficient model? Regardless of the reason, it’s important to know how to replace a hot tub heater.

If you want to save money, you might want to try replacing the hot tub heater yourself. You have to safely access the heater, carefully remove the heater, and then install the replacement. Once installed, have it tested to ensure that it is working properly.

In this guide, we’ll walk you through the process, so you can enjoy the warmth and relaxation of your hot tub all year round.

Key Takeaways

  • Replacing a hot tub heater can be done through a simple step-by-step process.
  • Different types of heating elements and proper installation techniques should be understood before attempting to replace a hot tub heater.
  • Regular hot tub heater maintenance is essential to ensure optimal functioning.
  • When buying a new hot tub heater, cost, energy efficiency, and compatibility are important factors to consider.
  • Even if your hot tub heater is experiencing issues, it may not necessarily need to be fully replaced.

Hot Tub Heater Basics

Before replacing your hot tub heater, it’s essential to understand the basics of this crucial component. Hot tub heaters come in different types, and each operates differently. The most common types of hot tub heating elements include:

Electric Heating Elements

Electric heating elements are the most popular and easiest to install. They work by conducting electrical current through a resistance wire, which heats up the surrounding water. Replacement of electric heating elements is straightforward and can be done without professional help. If you’re replacing an old electric heating element, it’s essential to select a compatible model with your hot tub.

Gas Heating Systems

Gas heating systems use natural gas or propane to heat up the water in your hot tub. They’re more potent and efficient than electric heating elements, but installation requires professional help and may be expensive. If you’re considering a gas heating system, check your local regulations to ensure it’s legal to use in your area.

Proper installation is crucial to ensure your hot tub heater functions optimally. If you’re unsure how to install a new heating element, consider hiring a professional with experience in hot tub heater installation.

“A hot tub heater is a crucial component of your hot tub system. Understanding the basics of the heating element and proper installation techniques is crucial to ensure your hot tub functions optimally.”

Troubleshooting and Repairing Hot Tub Heaters

If you are experiencing problems with your hot tub heater, don’t panic! It may not necessarily require a total replacement. Common issues can be easily diagnosed and repaired, saving you both time and money. Here are some troubleshooting tips:

  1. No heat? Check the temperature setting to ensure it is high enough. If it is, the heating element might be the culprit. Use a multimeter to measure continuity across the terminals of the heating element. If there is no continuity, the element is damaged and needs to be replaced.
    hot tub heater repair
  2. Low heat? If the heater is heating but not enough, check for obstructions in the filter, pump, and water lines. Clogged hot tub filters can be cleaned by soaking in filter cleaner, while you can remove airlocks in the pump by loosening the union fitting.
  3. Tripping GFCI? The ground-fault circuit interrupter (GFCI) protects you from electrical shock in case of a short circuit. If it trips continuously, the problem might be a ground fault. Check all plugs and wiring connections for water, rust, or corrosion.
  4. Leaking? If you see water around the heater, check the heater housing gaskets, unions and fittings. Tighten or replace loose ones, but don’t overtighten as they can crack easily.

If none of the above tips work, it might be time to call in a professional hot tub repair technician. They have experience in hot tub heater troubleshooting and can help identify and repair more complex problems.

DIY Hot Tub Heater Replacement

If you’re handy and looking to save money, you may want to consider replacing your hot tub heater yourself. However, keep in mind that working with electricity can be dangerous, so exercise caution and follow these safety measures:

  • Turn off the power supply to the hot tub at the breaker box.
  • Test the wires with a multimeter to ensure the power is off.
  • Wear gloves and safety glasses to protect against electrical shock.

Once you’ve taken the necessary safety precautions, you’re ready to replace your hot tub heater. Here are the steps you’ll need to follow:

Step 1: Access the Heater

Drain the hot tub and remove any panels necessary to access the heater. Disconnect all wires from the existing heater, taking note of their placement.

Step 2: Remove the Old Heater

Unscrew the old heater and remove it from the hot tub.

Step 3: Install the New Heater

Install the new heater in the same position as the old one, screwing it securely in place. Reconnect the wires exactly as they were on the old heater.

Step 4: Power On and Test

Turn on the power supply at the breaker box and test the new heater to ensure it’s functioning properly.

Remember, if you’re uncomfortable with any of these steps or unsure about working with electricity, it’s always best to hire a professional.

For a visual guide, check out this helpful video tutorial:

“How to replace your hot tub heater element – Arctic Spa”

Hot Tub Heater Maintenance

Regular maintenance is crucial to keep your hot tub heater in optimal working condition for years to come. Follow these essential maintenance tips:

  1. Check the water chemistry regularly and maintain it within the recommended levels to prevent the buildup of scale or corrosion in the heater.
  2. Inspect the heater element regularly for any signs of damage or corrosion. Replace it if necessary to avoid serious damage.
  3. Clean the heater element and filter periodically to prevent the accumulation of debris that can cause damage to the heater.
  4. Ensure that the heater has adequate water flow and that there are no blockages in the water circulation system.
  5. Insulate the heater and the hot tub properly to prevent heat loss and reduce energy consumption.

By performing regular maintenance on your hot tub heater, you can prolong its life and ensure that it functions optimally.

Factors to Consider When Buying a Hot Tub Heater

Choosing the right hot tub heater is a decision that should not be taken lightly. There are several factors to consider to ensure you get a heater that meets your needs and budget.


Hot tub heater cost can vary widely depending on the model, type, and features. Before you start shopping, determine a budget that you’re comfortable with. Keep in mind that a higher-priced heater may have added benefits, such as energy efficiency or longer lifespan. However, don’t overspend if it’s unnecessary, as there are quality heaters that come at affordable prices.

Energy Efficiency

Energy-efficient hot tub heaters help reduce your utility bills, making them a popular choice among buyers. Consider a heater that meets the energy efficiency guidelines set by organizations such as Energy Star or the Department of Energy. Look for heaters with higher thermal efficiency ratings, which means they produce more heat per unit of power consumed.


To ensure that the new heater fits correctly, compatibility with your existing hot tub system is a crucial factor to consider when making your purchase. Check the size and shape of the heater, compare its power and voltage requirements to see if they match your hot tub’s specifications before making a decision.


The brand is also an essential factor when selecting a hot tub heater. Choose from reputable brands that have been in the industry for a long time. Research online reviews, testimonials, and ratings from previous customers to identify which heater models and brands have been most successful for people.


The warranty is another crucial factor to take into account. Check warranties for defects in materials, parts, and workmanship, as well as the warranty length. A good warranty ensures that if you encounter any issues with your hot tub heater, you can repair it at no extra cost.

With this hot tub heater buying guide, you can make an informed decision to get the best value for your money. Take the time to research product specifications, read customer reviews, and ask questions before you purchase your new hot tub heater.


We hope that this guide has provided you with the information you need to successfully replace your hot tub heater. By following the steps outlined in this guide, you can save time and money, while ensuring that your hot tub stays warm and inviting all year round.

Remember to always prioritize safety when working with your spa’s heating system. If you’re unsure about the process, or if you encounter any unexpected issues, don’t hesitate to call a professional for assistance.

Regular maintenance is key to prolonging the life of your hot tub heater. Be sure to follow the maintenance tips outlined in this guide to keep your heater functioning optimally for years to come.

Finally, when it comes time to buy a new hot tub heater, consider factors such as cost, energy efficiency, and compatibility with your existing hot tub system. With a little research, you can ensure that you’re making a smart investment that will provide you with years of warmth and relaxation.


How often should a hot tub heater be replaced?

The lifespan of a hot tub heater can vary depending on usage and maintenance. On average, a heating element may last 5 to 10 years. However, if you notice a decline in performance or frequent issues, it may be time to consider a replacement.

Can I replace a hot tub heater myself?

While it is possible to replace a hot tub heater yourself, it is recommended to hire a professional to ensure proper installation and avoid any potential safety hazards. If you are confident in your technical abilities and familiar with the hot tub’s electrical system, you can attempt a DIY replacement with caution.

How much does it cost to replace a hot tub heater?

The cost of replacing a hot tub heater can vary depending on factors such as the type of heater, brand, and installation fees. On average, you can expect to spend anywhere from $200 to $800 for a new hot tub heater.

What are the signs that a hot tub heater needs to be replaced?

Signs that a hot tub heater may need to be replaced include inadequate heat output, constantly tripping the breaker, unusual noises, or visible damage to the heating element. If you experience any of these issues, it’s best to consult a professional for an accurate diagnosis.

Jeff Campbell