What Is The Life Of A Pool Water Heater? [Ultimate Guide!]

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A pool water heater is a device that is typically used in residential and commercial swimming pools to provide heated water to the pool. The main components of a pool water heater include a water tank, a pump, a thermostat, and a heat exchanger. A swimming pool needs water to remain attractive and healthy for bathers to enjoy.

Why Do You Need A Pool Water Heater?

The most straightforward answer to this question is to provide heated water to the pool. However, there are several more reasons why you might want a pool water heater.

If you are using saltwater for your pool, you will need to ensure that the water is always at a comfortable temperature for swimmers. In addition, having a pool with no swimming pool heater is certainly an option, but then again, so is having one that doesn’t work properly. There are a number of different types of pool water heaters, so make sure you find one that suits your needs.

A pool water heater can also be a great safety device. If the water in your pool is too hot, you or a swimmer could suffer from scalding. In addition, having a pool water heater is a great way to guard against freezing temperatures since most of them are designed to be installed outside the pool area to prevent damage from freezing water. Finally, residential pool water heaters are often easier to maintain than commercial ones since they don’t need to be serviced by a professional engineer every month. Unless you are dealing with a particularly expensive or complicated unit, you can probably handle most maintenance tasks yourself with only a little help from an appliance technician.

The Main Components Of A Pool Water Heater

Now that you know what a pool water heater is and why you might want one, it’s time to take a look at its main components.

Water Tank

The water tank is the largest component of a pool water heater and is usually made of steel or stainless steel. The tank holds the water that will be provided to the pool by the pump. If you plan on using your pool for swimming, you will need to choose a large enough tank to accommodate a sufficient amount of water when it’s filled. In addition, the tank should be equipped with a swish mechanism that will help maintain the cleanliness of the water. These mechanisms work by moving the water around in the tank so that it remains agitated and prevents the formation of algae or other organisms at the bottom of the tank.

The inner tank area of the water tank should also be designed to prevent the possibility of scalding or burning due to contact with the water. The insulation surrounding the tank should be able to withstand extreme temperatures without affecting the operation of the pump or the temperature of the water contained within. In addition to insulation, the area within the tank that is closest to the water should be equipped with safety guards or similar protection to prevent accidents.


The pump is the part of the pool water heater that is responsible for moving the water from the tank to the pool. In most cases, the pump is turned on by a thermostat located near the pool area. Once the water in the tank reaches a pre-determined level, the pump will start circulating the water through the heat exchanger and back to the pool. The flow rate of the pump should be sufficient to provide adequate water circulation around the pool without causing dangerous situations due to flooding or dry-outs.


The thermostat is responsible for controlling the temperature of the water flowing from the pump to the pool. Most residential pool thermostats are designed to be controlled manually, but they can also be set to be controlled automatically by a timer or an alarm system. In case of a power outage or other unexpected situation that prevents the normal operation of the thermostat, there is also a back-up heat source that can provide temporary heating to the pool water. This type of thermostat is known as a fail-safe device and ensures that the pool water remains at a comfortable temperature, even in case of a malfunction or power outage.

Heat Exchanger

The heat exchanger is the part of the pool water heater that absorbs the heat from the water flowing from the pump and transfers it to the water in the tank. The heat exchanger is usually made of aluminum or copper and should be protected from corrosion and mineral build-up that would otherwise affect its efficiency. In case you are using saltwater for your pool, it is extremely important to ensure that the minerals don’t accumulate at the base of the heat exchanger since they can cause serious damage to the unit.

Common Problems With A Pool Water Heater

Like any other piece of home equipment, pool water heaters can occasionally experience problems that require professional help to fix. Some of these problems are more common than others, so it is worth knowing what they are before you start experiencing them. The following are the most common problems that people have with their pool water heaters and the expected troubleshooting procedure:

Stuck Pump

If the pump won’t start, it is usually a sign that something is wrong with the electrical system that connects it to the plug of the pool water heater. This could be caused by a short circuit or a problem with the electrical cord that plugs into the wall socket. If you find that the pump is stuck in the ON position, there should be no problem figuring out which of the above is the case since you’ll know immediately whether there is or isn’t power getting to the pump from the socket. If there is no power getting to the pump, then it is either a short circuit or a disconnected electrical cord, neither of which can help the pump start. To fix this problem, you will need to call an electrician so that they can examine the electrical system and either fix or replace it as necessary.

Noisy Or Strange Noises

Noise is one of the biggest problems that people experience with their pool water heaters. It is either very loud noise or strange noises that keep them up at night and make them wonder whether or not the unit is okay. These noises can be any combination of creaks, rattles, or groans that the unit might make as it operates. Strange noises could be anything from a slamming door to an animal falling into the pool area. There should be no reason for these noises other than that the unit is simply functioning as it should. If these noises persist over a period of time, there is usually a reason why they are happening. Sometimes it is a simple fix, but other times it can be more complicated and require professional help.

Expensive Fixes

There is a wide variety of problems that can cause expensive fixes for a pool water heater. Many of these problems require professional help and advanced knowledge of electronics to repair. Some of the more common expensive fixes that people experience include:

  • Corrosion, which is when minerals and chemicals from the water collect at the base of the tank and start eating away at the metal parts inside
  • Leaky or damaged tanks that begin to rust and deteriorate over time
  • Pumping systems that become damaged or worn out eventually due to too much use
  • Heating elements that start malfunctioning or breaking down after a while
  • Damaged or faulty electrical wiring that causes the pump not to start or stop when it’s meant to
  • Leaks in the pipe system that carry the water around the house

How To Look After Your Pool Water Heater Better

Now that you’re equipped with the basics of what a pool water heater is and the various problems that you might encounter, it’s time to discuss some tips on how to take care of your pool water heater so that it will serve you well for many years of use.

Be Careful In The Pool Area

It is extremely important to be extremely careful in and around the pool area when using any type of heat treatment for the water. You must take the proper safety measures to prevent accidents from happening. This includes using protective garments such as goggles and gloves, and keeping the area clear of any objects that might be harmed by the heat treatment or become heated themselves and start a fire.

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