How do you fix a high limit switch on a hot tub?
The High Limit Switch Needs to Be Reset or Replaced Occasionally, the high limit switch will trip when you’re filling your spa. Or it might need a reset from time to time for no known or serious reason. Simply reset by pressing the big red button on your spa pack.
How do you test a hot tub 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.
What does a high limit sensor do?
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.
Why is my furnace going off on high limit?
In a gas furnace, a high-limit, switch turns the unit off if air doesn’t ventilate from the exhaust flue properly. A high-limit switch will turn a furnace off if it becomes too hot or is obstructed. Changing the furnace’s air filter and cleaning the blower motor may help the switch perform better.
How do you reset the high limit sensor on a hot tub?
Another type of high limit switch is a mounted sensor, often referred to as a THERMODISC. The hot tub high limit switch is sometimes triggered when you’re refilling your hot tub and can be reset by pressing the large red button on your spa pack.
How do you clean a high limit switch?
Remove the furnace access panel to locate the high limit switch on the outside of the plenum. Unscrew the switch from the plenum. Use steel wool or sandpaper to gently clean away soot and other materials stuck on the rod. Replace the switch and access panel.
What causes high limit trips?
A high limit switch will keep tripping due to a dirty flame sensor, short cycling, obstructed airflow, or a defective switch. These lead to overheating within the gas furnace that triggers tripping as a safety measure to prevent fires. Clean and replace dirty and worn-out parts to fix the problem.
How much does it cost to replace a high limit switch?
Average Cost of a New Furnace Limit Switch You will need to buy a high limit switch that is produced by the same manufacturer as your furnace unit. Depending on who your OEM is, this component could roughly cost you anywhere from $4 to $25.
Does my hot tub have a reset button?
There are generally two “hard resets” in hot tubs, the GFCI, and the high limit reset. The GFCI pops if there is any type of electrical short (such as water getting into the heating element, the reset on that can be in one of three places.