How To Reset Air Conditioner Float Switch

Posted by: Mas Broto
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AC float switch, also sometimes called an AC safety switch, is a safety device that shuts the system down when condensation overflows the drain pan. It detects clogged condensate drains to prevent water damage to the home. In this post, we’ll guide you on how to reset air conditioner float switch.

The air conditioner float switch is a sensor to detect the condensate water status in your drain pain. If the water status exceeds a specific height, the float switch will trip and turn off your air conditioning system.

Where Is my AC float switch?

The float switch is usually installed on the secondary drain pan. The location relies on the orientation of your HVAC equipment; it can be in the attic or garage.

The AC float switch doesn’t always work the way it should. When installed incorrectly or has a mechanical failure, it will not trip. The homeowner needs to do a simple check, and a simple reset usually will make it work again.

Here is a step by step guide on how to reset the air conditioner float switch:

  1. Turn off the HVAC system using the circuit breaker.
  2. Drain the water out of the drain pan.
  3. The float switch will automatically reset once the water level is low enough. If not, then there’s a problem with the device.

Here is how to troubleshoot the AC float switch:

  1. Follow step 1 and step 2.
  2. Locate the AC float switch in the drain pan.
  3. Turn ON your air conditioner and set the thermostat to cool.
  4. Lift the float arm on the float switch while the system is running and hold it for at least 1 minute. If the system fails to trip, there are problems with the device. If the system trip properly, returns it to the lowest position. The AC float switch should reset and turn back on within 5 minutes.

To reset the AC float switch, you need to remove the water on the drain pain. The best way to remove the water is with a shop vacuum. If the drain pan does not drain, it is recommended to call a professional technician.

In addition to preventing water damage by shutting off the AC system, the float switch also prevents mold and bacteria growth. An HVAC professional can easily install an air conditioner float switch at a low price.

It’s a great idea to install a safety switch on your air conditioning unit to prevent water damage. There is also an alternative to the AC float switch; it’s a wet switch that also detects when condensate water overflows.

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Mas Broto
Have been in the heating and air conditioning (HVAC) industry for over 20 years. He is person that will grow and thrive to learn more about the HVAC industry throughout his career. Mas Broto is also a blogger, who's dedicated to bringing you the best knowledge to get ahead in the game of life.