My Hot Tub Won't Heat

While this may seem like a simple issue it can be tricky to diagnose if you are not fully trained in diagnostics of electronics and hydraulics. These issues can range from a dirty filter to a relay burned on the back of a printed circuit board. Always ensure your filter is clean before calling for a repair. There are multiple sensors including high limit, flow, temperature, vacuum, dry fire, pressure, and depending on your hot tub model any of these could be defeating your tubs ability to heat. Most hot tubs have an electric heating element installed in them somewhere and can also fail and cause a heat loss. These elements are difficult to access in most models and easily damaged during installation if not done correctly. They often require specialized tools to install properly. Another potential issue could be a pump not working correctly reducing the flow through the heater. This can be checked using a motor tachometer to check for the proper speed of the motor. The motor has more than one speed in most cases so be sure to check both speeds. Due to the fact that parts are expensive if you replace the wrong part, and that these repairs almost always require you to work with electricity around water, we strongly recommend having a qualified professional make your repairs.