The Climatemaster 39B0017N02-300/240# High Pressure Switch is a safety control component designed to monitor refrigerant pressure in HVAC systems. It operates by detecting excessive pressure levels and automatically interrupting the electrical circuit when pressure exceeds the specified limit. This helps protect compressors and other system components from potential damage caused by h... https://www.partshnc.com/39b0017n02-climatemaster-300240-high-pressure-switch