Troubleshooting: The Spa Overheats
- Wellis
- 34 minutes ago
- 2 min read
Spas are designed to maintain elevated temperatures for a warm, relaxing experience, and unlike swimming pools they don't have a cooling system. This heat retention is intentional to provide therapeutic benefits, like stress relief and muscle relaxation. However, spas can overheat if outside temperatures are high, if placed in direct sunlight, or if the filtration cycle is set too high. Malfunctions, such as a stuck relay, can also cause overheating. Spa owners should regularly monitor temperatures and system functionality to prevent overheating and ensure safety.

Outside temperature/direct sunlight
High outside temperatures can heat the spa beyond the internal heater's settings, as ambient warmth raises water temperature, challenging the spa’s system to maintain comfort.
To cool the spa, switch to economy or sleep mode to reduce heating and energy use. Open air valves for better airflow and evaporation, aiding cooling and circulation. Removing the spa cover briefly allows heat to escape and cooler air to mix with the water. Ensure the cover is off only briefly to maintain water quality. These strategies help manage spa temperature for a refreshing soak even in hot weather.
Filtration cycle settings
Setting the filtration cycle too high causes the pump to run excessively, leading to heat buildup and elevated temperatures in the spa cabinet. This strains the pump, risks premature wear, and may result in costly repairs. Additionally, the water overheats, causing discomfort, health risks, and disrupting chemical balance, necessitating frequent adjustments.
Adjust the filtration cycle to low (F2 /Fil2) for optimal filtration, maintaining stable temperatures, enhancing energy efficiency, reducing costs, and extending equipment lifespan for a safer, more enjoyable spa experience.
Stuck relay
When a relay becomes stuck on the circuit board for the heater it will not allow the heater to turn off. If this is the issue, when the pump turns off the heater will continue running and overheat within its tube.
When this occurs, the spa shuts down and stops heating displaying a flow code. This is rare but can happen.
If a relay is determined to be the cause of the issue, you'll need to get in touch with our staff to replace pack.
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