This air conditioner high pressure switch can replace the original factory number. This air conditioner pressure switch has the same size as the original factory number and is a perfect replacement for damaged or aged HVAC pressure sensors. The air conditioner high pressure switch can be used to monitor the refrigeration pressure in the air conditioning pipeline to ensure that the air conditioner pressure switch works properly and maintains the stable operation of the compressor to avoid damage. (Our 1551343 air conditioner pressure switch is a high pressure switch, not a low pressure switch. There are two versions of air conditioner pressure sensors: one for high pressure compressors and the other for low pressure compressors.) This air conditioner compressor high pressure switch is carefully built with original parts data and can directly replace old/damaged switch sensors. Please make sure the electrical connections are clean before use to ensure that the connection is normal. Excellent performance: The refrigerant pressure sensor is made of aluminum and plastic materials, with a stable, durable, weather-resistant and not easy to break structure, and the air conditioner high pressure switch can be used for a long time.