Just like inside your home, the temperature of the water in your hot tub is regulated by a thermostat. If the water isn’t heating or reaching your desired temperature, check your thermostat’s setting. If everything looks fine you can investigate further by inspecting the cord and looking for damage.
A dirty filter can create “low flow” in your spa or hot tub. If you notice it isn’t heating as it should, remove and clean the filter to ensure that pressure and flow rate aren’t the issues. Flow issues can also be caused by a block spa drain, clogged pipes, closed valves, a clogged pump impeller, or simply a low water level.
The high-limit switch in your hot tub is similar to the pressure switch. This component is a part of the safety circuit. It is designed to prevent the heater from overheating. These switches are calibrated to shut off at a predetermined maximum temperature. When this temperature is reached, the switch will open, breaking the circuit that powers the heater. Low water flow, incorrect voltage, and loose wire connections can all be causes for a high limit switch to malfunction; preventing the hot tub from properly heating.
Like with any machine that runs on electricity, the components that complete and power the circuits generating the power need to be intact and functioning. While these problems can be frustrating, they can also be simple to fix. Make sure that all connections are tight and not oxidized. Check for blown fuses. Check your GFCI to see if it is tripped.
Lucas Firmin Pools builds, maintains, and services custom pools, hot tubs, and spas in the Baton Rouge area. If your pool or spa isn’t heating, or its time to update or upgrade your pool or spa, the expert team at Lucas Firmin Pools is here to help.