Sometimes also called a hot tub high limit sensor or simply a high limit sensor, this is a safety feature built into all hot tubs that prevents them from overheating. It keeps the temperature from exceeding 120°F (49°C) in most cases.Click to see full answer. Also to know is, where is the high limit switch on a hot tub?A limit switch will be located in your heater enclosure, mostly in its lower left corner. It is usually white in color with a red button at the center. If your water is not heating up and you think the heater is the problem, one heater element that you need to check out will be the limit switch.Subsequently, question is, how do I reset my hot tub control panel? How to Reset a Spa Heater Locate the spa’s high-limit reset. This is a red button found on many spa packs. Press the high-limit reset button. Turn on your spa and observe its operation. Flip the breaker panel switch on or press the reset button on the GFCI outlet to restore power. Also, how do you reset the high limit switch on a hot springs spa? Simply reset by pressing the big red button on your spa pack. The high limit switch may be housed in a thermowell. If the water temperature in the thermowell is the same as the water temperature in the rest of the spa, the switch is damaged and needs to be replaced.What causes a high limit switch to trip?When a high limit switch gets tripped due to overheating, that contributes to wearing out the switch faster. One of the most common causes of furnace overheating is a clogged furnace filter.

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