How to Adjust an HVAC Condensation Pump Float

The condensation pump on an HVAC unit forces out water from a collection basin to a drain or outdoors, safely away from the building foundation. An air conditioner condenses water vapor, causing dripping on air conditioning systems and water collection around the AC unit's evaporative coil. When water in the collection reservoir reaches a certain level, it pushes up against a float switch. The switch triggers pump activation to remove the water. Adjusting the float takes only a few minutes.

Screwdriver set

Instructions

- 1
  Turn off the HVAC unit at the circuit breaker. Although adjusting the float will not bring you in direct contact with electricity, you will be working around water adjacent to high-voltage equipment. Shutting off the power is a standard safety procedure.
- 2
  Remove the cover on the water reservoir tank next to the pump, which is mounted on the side. The cover simply lifts off of some reservoirs. On other equipment, the cover may be secured by screws. Remove them with a screwdriver. The float assembly is attached to a metal rod extending to the bottom of the reservoir. A circular float, typically made of Styrofoam or cellular foam material with a thin metal backing, is attached to the rod.
- 3
  Twist the screw on the top of the float clockwise to lower the water level needed to trip the switch and activate the pump. Twist the screw counterclockwise to increase the water level.
- 4
  Replace the reservoir cover and turn on the circuit breaker for the HVAC system after drying your hands.

How to Wire a York Heat Pump Thermostat

How to Change a Thermostat With New Heat and A/C

Heating & Cooling Repair