ClimateMaster 12B0005N01 Condensate Sensor is a safety monitoring component designed to detect high condensate water levels in compatible HVAC systems. It works by sensing excess water in the drain pan or condensate line and sending a signal to shut down or alert the system, helping prevent overflow and water damage. This sensor is commonly used in ClimateMaster geothermal heat pumps,... https://www.partshnc.com/12b0005n01-climatemaster-condensate-sensor