No matter where your HVAC unit is located, it's important to install a float switch or, if appropriate for your unit, a condensate pump. An overflow on the top level of your home could cause significant damage to the floors below and result in microbial growth, mold and hazardous living conditions.
How do you reset a float pan drain switch?
https://www.youtube.com/watch?v=kj2ePTaNdg8
How do you fix an AC float switch?
https://www.youtube.com/watch?v=AiBFL-l0uxY
How does a AC float switch work?
The switch is activated when the level of the water in the pan comes above a certain point, causing the switch mechanism to trip/float to rise. When this happens, the switch will then send a message to the AC unit, and it will shut off, stopping the phase conversion and creation of condensation.
How do I reset my AC water sensor?
One or two drops will cause Wet Switch to turn off a unit, alerting a serviceman to a moisture problem. A lit LED indicates the Wet Switch is activated and has turned the unit off. Reset simply by drying the absorbent pad with a paper towel and pressing the reset switch.