What is the Weird Noise Coming from My Pool Heater?


Generally, occasional bubbling and gurgling are expected when a pool heater is operating. However, in some instances, the heater may produce unusual noises, which may be unbearable to most pool users. 

If this is the case, then worry no more! Below we highlight some of the possible causes of the noise and how you can solve them:

Dirt and System Obstruction

Does your pool’s heater sound like a grating or grinding machine? If so, then a possible obstruction by dirt may be the cause of the strange noise. The debris hampers the heater system’s smooth flow of gas and water.

If you haven’t cleaned your pool heating system for a while, it is prudent to start with a manual flush. The system’s manual should provide clear troubleshooting instructions on how to do it. But if you are unsure about the process, you can reach out to your licensed pool technician or electrician.

Scale Buildup

Like all your home water fixtures, your swimming pool equipment may malfunction because of scale buildup. Scale buildup may occur in various parts, such as piping, but it is more common at the waterline.

If a quick system flush doesn’t do the trick, you may need to scour your heat exchanger to eliminate the scale. 

What About the Whistling Sound?

Improper gas pressure and blocked burner orifices are common causes of a whistling noise in pool heaters. Always keep your burners clean to prevent such noises and maintain proper gas pressure. 

Low gas pressure may be the probable cause of whistling, and you should get it adjusted by checking your user manual. 

Clogged burners cause whistling too, and you can unclog such burners using a proper-size wire or paper clip. But you should remember to shut the valves and countercheck your system’s manual before doing it. 

If the whistling sound does not stop after all these processes, then it will be time to contact your pool heater technician or service company.

Pressure Switch Malfunctions

Malfunctioning pressure switches on pool heaters may cause your pump to shut off while the heater is operating. 

A simple DIY switch replacement may solve the problem, but you need to read your user manual to learn about switch specifications and the changing process.

If nothing seems to work after all these corrective measures, you should contact your local pool service company for professional help.

Do You Need a Pro to Solve Your Pool Heater Noise?

Noisy pool heaters are indicatives of a malfunctioning pool heating system, which may create a safety hazard. If your troubleshooting does not solve the problem, then you may need professional help.

At Mokupuni Pool Service & Repair, we have advanced knowledge of pools and their equipment, and we can get your collection working correctly in no time. Whether you want a partial or complete inspection and repair, our team is always ready to tend to your needs.

Call us today to learn more about our services.


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