How to Install a Condensate Float Switch


Condensation builds in the drain pan of an air conditioning unit as the unit cools incoming air. A condensate switch turns on a pump when condensation builds to a level that it could flow out of the pan and onto the surrounding area. When a condensate switch fails, condensation will begin to overflow the sides of the condensate pan. The overflowing condensation will damage wood supporting the AC unit and create an environment that promotes the growth of mold and mildew.

Things You'll Need

  • Wire cutter
  • Wire stripper
  • 2 wire nuts
  • Flip the breaker supplying power to the air conditioning unit to the "Off" position to disconnect power to the unit.

  • Turn the two thumb screws located on the backside of the condensate float switch counterclockwise to increase the mounting slot gap.

  • Slide the opened slot over one flange of the condensate pan resting below the AC unit with the body of the switch sitting inside the condensate pan. Push the switch down until the bottom of the switch sits firmly on the bottom of the condensate pan. Turn the two thumbs screws clockwise to lock the switch in place.

  • Cut the red "R" terminal wire running the thermostat with a pair of wire cutters. Strip 1/2 inch of insulation from each end of the cut terminal wire and the end of each float switch wire with a pair of wire strippers. Twist one end of each float switch wire to one of the exposed section of the cut "R" terminal wire. Secure the wires by twisting one wire nut onto each pair of wires.

  • Flip the breaker to the "On" position.

Related Searches


Promoted By Zergnet


You May Also Like

  • How to Repair a Float Switch on a Sump Pump

    As water levels get higher, a float switch activates a sump pump that pumps water away from your home. If a float...

  • How to Wire an Outside AC Condenser

    An air conditioning system uses the outside condensing unit to force liquid refrigerant through a metering valve, found in the inside unit's...

  • How to Wire an AC Switch

    Wiring an electrical alternating current (AC) switch involves some planning and forethought, but is not a difficult procedure. Safety needs to be...

  • How to Wire a Condensate Pump

    An air-conditioning system uses a condensate pump when a standard condensate drain system will not work. When an air conditioner removes humidity...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!