How do you test a spa High limit sensor?
Testing Spa Temperature Sensors
- Shut off all power to the spa at the breaker and spa pack.
- Set your Ohm meter to the 20K setting.
- Locate the wire ends and remove the plug from the board.
- Place your meter leads onto the green and red wire.
- Compare readings to Thermistor Resistance vs. Temperature Chart.
Why is my hot tub high limit switch not working?
If the water temperature inside the high limit switch thermowell is higher than the water temperature in the rest of the spa, you may have calcium buildup on the thermowell. The resulting low water flow can impact the high limit switch functioning.
What happens if your hot tub is too hot?
If the switch detects unsafe temperatures, it opens to break the circuit and keep the heater from literally melting down. Once the water temperature in the hot tub has decreased, the high limit switch must be reset manually. The high limit switch will trip if: The hot tub water is too hot and may harm bathers or the spa.
What to do if your hot tub heater keeps tripping?
If so, you should let the tub run a few times and it should come back to normal. Also, find a red button in your spa pack, which is the high limit switch, and reset it. If this switch is constantly tripping, even if you haven’t emptied out the tub recently, you should get in touch with a repairman.
What does hi limit mean on a hot tub?
Hi limit sensor is disconnected or shorted or the spa temperature is above 112° F. SEoP = Sensor open or disconnected. Heater disabled but the spa is operational. SESH = Sensor short, nonfunctional. Heater disabled but the spa is operational. PSoC = Pressure switch open with circulating pump. PSoL = Pressure switch open with low pump.
If the water temperature inside the high limit switch thermowell is higher than the water temperature in the rest of the spa, you may have calcium buildup on the thermowell. The resulting low water flow can impact the high limit switch functioning.
If the switch detects unsafe temperatures, it opens to break the circuit and keep the heater from literally melting down. Once the water temperature in the hot tub has decreased, the high limit switch must be reset manually. The high limit switch will trip if: The hot tub water is too hot and may harm bathers or the spa.
If so, you should let the tub run a few times and it should come back to normal. Also, find a red button in your spa pack, which is the high limit switch, and reset it. If this switch is constantly tripping, even if you haven’t emptied out the tub recently, you should get in touch with a repairman.
What should the high limit be in a hot tub?
You may choose to test the temperature that the high limit trips at. It should trip between 110 and 120°F. If the temperature inside the thermal well is higher than the spa water, check for calcium build-up on the thermal well.
