Pool Heater Maintenance: Preventing and Resolving Common Problems


A pool heater can turn your swimming pool into an oasis of comfort, extending your swimming season beyond the warm summer months. However, like any piece of equipment, swimming pool heaters require regular maintenance to ensure they function efficiently and last for years. In this blog, we’ll cover the basics of pool heater maintenance, including preventing common problems and troubleshooting when issues arise.

Preventive Maintenance

Preventing problems with your pool heater begins with regular maintenance. Here’s a step-by-step guide to help you keep your heater in top shape:

1. Read the Manual

Start by thoroughly reading the manufacturer’s manual that came with your pool heater. This will provide specific maintenance guidelines and important safety instructions.

2. Regular Cleaning

Keep the area around the heater clean and free from debris. Leaves, dirt, and other obstructions could block the heater’s air intake or cause overheating and affect its efficiency.

3. Check for Leaks

Inspect your heater for any signs of water leaks. Leaking water can damage the unit and lead to costly repairs.

4. Clean the Heating Element

The heating element is a crucial component of your pool heater. Over time, it can accumulate scale and debris, reducing its efficiency. Follow the manufacturer’s instructions to clean it properly.

5. Clean or Replace Filters

Pool water passes through filters before reaching the heater. Dirty or clogged filters can reduce water flow, affecting the heater’s performance. Clean or replace your pool filters as needed.

6. Maintain Proper Water Chemistry

Balanced water chemistry is essential for the longevity of your pool heater. High or low pH levels can corrode the heater’s components, depending upon its material. Regularly test and adjust your pool’s chemical balance.

7. Schedule Professional Maintenance

Consider scheduling annual professional maintenance of your pool equipment, including your pool heater. A trained technician can thoroughly inspect, identify potential issues, and ensure your heater is in top condition.

Common Pool Heater Problems and Solutions

Despite your best efforts at preventive maintenance, swimming pool heaters can encounter problems from time to time. Here are some common issues and how to resolve them:

1. Heater Won’t Start

Possible Causes: Electrical issues, thermostat or flow switch settings.

Solution: Check the power supply, and the thermostat – If the water temperature is higher than the selected temperature, then it won’t turn on. If your heater has a built-in safety flow switch, check the water direction, all valves are fully open and ensure the flow rate meets the minimum requirements. If the issue persists, contact a professional technician.

2. Low Heat Output

Possible Causes: Dirty filters, a clogged heat exchanger, or insufficient gas flow.

Solution: Clean or replace filters, inspect and clean the heat exchanger, and ensure proper gas supply.

3. Strange Noises

Possible Causes: Debris in the heater or loose components.

Solution: Remove any debris, and/or tighten loose components.

4. Leaks

Possible Causes: Damaged seals, corrosion, or loose connections.

Solution: Identify the source of the leak and repair or replace the affected components. In the case of extensive corrosion, it may be time to consider a new heater.

5. Inconsistent Heating

Possible Causes: Improperly sized heater, poor water circulation, or thermostat problems.

Solution: Ensure the heater is appropriately sized for your pool, address circulation issues, and inspect and calibrate the thermostat.

6. Rust or Corrosion

Possible Causes: Exposure to moisture and harsh weather conditions.

Solution: Regularly inspect your heater for signs of rust or corrosion. Apply protective coatings or covers to shield it from the elements. Alternatively, find a heater that uses corrosion resistant titanium tubes and heating elements to avoid these issues.

7. High Energy Consumption

Possible Causes: An inefficient heater, dirty filters, or prolonged use.

Solution: Improve the heater’s efficiency through regular maintenance, clean filters, and use a pool cover to reduce heat loss when the heater is not in use.

Remember that safety should always be a priority when dealing with pool heater maintenance and troubleshooting. If you’re unsure about any aspect of maintenance or if a problem seems beyond your expertise, it’s best to seek professional assistance to ensure the safety and functionality of your pool heater.

By following these maintenance tips and promptly addressing common issues, you can enjoy the benefits of a warm and inviting swimming pool throughout the swimming season, all while prolonging the life of your pool heater.

About Elecro Engineering

Our extensive range of electric swimming pool heaters caters to pools of all sizes, including spas, above-ground pools, privately owned residential pools, and large-scale Olympic-sized commercial pools. Each of our products is renowned for their energy efficiency and features high-quality spiral-wound titanium heating elements, ensuring corrosion-resistant operation and self-cleaning Vortex technology for extended longevity.

Equipped with an ultra-reliable flow switch, temperature thermostat, and overheating sensor, our heaters stand as the pinnacle of safety in water heating products. Compatible with sea and salt-chlorinated water, each product surpasses the durability of many alternative heaters on the market, and are meticulously designed and manufactured with an emphasis on low maintenance and long-term operation.

Take a look at our range of heaters to find the ideal system for your needs.

Alternatively, if you have a specific requirement in mind, we can provide a bespoke heating solution tailored to your needs.