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If you have ever noticed a flashing yellow light on your hot tub, you may be wondering what it means and how to troubleshoot it. While a flashing yellow light can mean different things depending on your hot tub model, understanding the most common causes and how to address them can help you keep your hot tub in top condition. In this article, we will answer the question “What does a flashing yellow light mean on my hot tub?” through exploring key elements of hot tub maintenance, breakdowns, and fixes.

What is a Flashing Yellow Light?

A flashing yellow light indicates that your hot tub is malfunctioning or has stopped working. It is important to understand the exact meaning of the flashing yellow light, as its message can vary between models. For instance, a flashing yellow light can mean different issues such as a heater problem, pressure switch issue, or an airlock.

Common Causes of a Flashing Yellow Light

Low Water Level

If the water level inside your hot tub is too low, it may trigger the flashing yellow light. It is essential to keep the water level at the safe mark where your hot tub’s sensors can detect it. You can easily detect the safe water level by checking your hot tub’s owner’s manual.


A flashing yellow light can also indicate that your hot tub is overheating. When the temperature of the water becomes too hot than what’s recommended in your owners manual, it will trigger the flashing yellow light. In this case, you need to turn down the temperature by adjusting the thermostat.

Draining and Refilling

If you haven’t drained and refilled the water on your hot tub in a while, it may also cause the flashing yellow light to be triggered. In this case, you will need to clean the hot tub properly by draining and refilling the water. This will help to prevent the issue from repeating.

Poor Electrical Connection

A poor electrical connection between the hot tub and your power outlet may be the cause of the flashing yellow light. It is important to check if the power outlet has a loose connection and if everything is plugged in properly. If there is a loose connection, try replacing the power cord to ensure that the connection is strong.

Troubleshooting a Flashing Yellow Light

If you have checked all of the possible causes of the flashing yellow light and it persists, it is likely time to call in a professional. An experienced technician can examine the issues and help get your hot tub functioning properly with the right instructions and repair parts.

People Also Ask

What does a flashing green light mean on my hot tub?

A flashing green light usually means that the heater is functioning. It may also indicate that the temperature in the hot tub is too low and needs to be increased.

Why is my hot tub light flashing?

Your hot tub light may be flashing due to low water level, a heater problem, pressure switch issue, an airlock, or a poor electrical connection.

How do you reset a hot tub?

To reset a hot tub, you need to press and hold down the “on” button for 10 seconds until the light blinks. This will reset the heater and the pump.

How do I know if my hot tub heater is working?

If your hot tub is equipped with an LCD display, you can view the temperature readings to check if your hot tub heater is working.

How do I troubleshoot a flashing red light on my hot tub?

A flashing red light usually indicates a system error. It is important to refer to the instructions in your hot tub’s owner’s manual to investigate the root cause.

Final Words

Understanding the meaning behind a flashing yellow light on your hot tub is essential for troubleshooting the issue. By being aware of the common causes, such as low water level and overheating, you can be more prepared for any breakdowns and make sure your hot tub is running smoothly. With the help of this guide and regular maintenance, you can make sure your hot tub is functioning optimally and offers the best hot tub experience.