The Drain Pan Switches & Float Sensors category is dedicated to the overflow protection devices that protect homes, commercial spaces and HVAC equipment from water damage. These switches monitor condensate levels and shut down the system or trigger an alarm when a blockage, pump failure or drain restriction is detected. A properly installed float switch is one of the most important safeguards on any air handler, fan coil, mini-split or high-efficiency furnace.
This category includes primary pan float switches, secondary drain pan switches, inline float sensors, wet/dry sensors, electronic water detection switches and mini-split float switches. Many models are designed to mount directly on the primary pan outlet, auxiliary pan, tee fitting or condensate pump reservoir. Modern electronic detection sensors provide fast response times and are ideal for equipment installed in attics, closets and tight mechanical spaces where water damage risk is high.
Before selecting a float switch or sensor, confirm unit type, drain configuration, condensate volume and local code requirements. Equipment located in attics or above finished areas should always include both a primary and secondary safety switch. For mini-splits, choose a compact switch designed to fit in the limited space under the evaporator or inside the drain line.
Pro tip: Always test the float switch after installation by slowly adding water to the drain pan or tee. Ensure the system shuts down immediately. For electronic sensors, verify power and alarm wiring. Recommend switches be inspected during every seasonal tune-up to prevent surprises during peak cooling months.
Drain pan switches and float sensors detect high condensate levels, blockages and pump failures. They provide system shutdown or alarm activation to prevent water overflow and damage. Includes primary pan switches, secondary pan switches, tee-mounted float switches, electronic detection switches and mini-split safety sensors.
