In order for the switch to open it must be positioned in a location that is dry normally and will reliably fill with water when a drainage issue occurs.
Condensate drain pan float switch reset.
Lift the float arm on the float switch while the system is running and hold it for at least 1 minute.
Reset simply by drying the absorbent pad with a paper towel and pressing the reset switch.
The electrical section of the switch is defective if the system fails to shut down.
However it does this in a different way.
The water in the emergency pan will have to be removed to reset the switch.
Unlike float switches wet switches are normally placed in a secondary drain pan which is usually dry.
The wet switch keeps that from happening.
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A lit led indicates the wet switch is activated and has turned the unit off.
And yet we still install a float switch inside the drain line it s like a second line of defense.
Some systems have an internal time delay on the blower and will continue to run for 30 seconds to 60 seconds after receiving a low voltage signal to turn off.
If the system is installed horizontally the float switch should be installed on the emergency drain pan located underneath the air handler in the attic or suspended in the garage.
With a standard pan float switch installation a lot of water can leak out before the float switch turns the system off assuming it works properly.
A common alternative to the float switch is a wet switch which also detects when condensate water overflows.
The best way to remove the water is with a shop vacuum.
Turns system off when detecting moisture due to condensate or drain leaks.
Float condensate switches are designed so that they will remain closed when water is going down the drain like it s supposed to and then open when an overflow condition occurs.