020-551

The Low Pressure Switch BZ is a critical safety component designed for residential and commercial HVAC systems, including central air conditioners and heat pumps. This air pressure switch acts as a protective sensor, monitoring the refrigerant levels within the cooling cycle. If the system pressure drops below a safe threshold—often due to a refrigerant leak or a restricted coil—this switch automatically interrupts the electrical circuit to shut down the compressor. By preventing the system from operating under low-pressure conditions, it protects expensive internal components from overheating and mechanical failure. This high-quality replacement air proving switch ensures your climate control system operates efficiently and safely, making it an essential part for routine maintenance or emergency HVAC repairs.
Type: Air Pressure Switch / Low Pressure Cutout
Size: Compact
Application: Used in central air conditioning units and heat pump systems to monitor refrigerant pressure and provide compressor protection.
Specifications: Low-pressure safety cutout; air proving functionality; designed for HVAC refrigerant lines; helps prevent compressor burnout due to loss of charge.