Lennox 17W14 40/15 Low Pressure Switch

The Lennox 17W14 40/15 Low-Pressure Switch is an essential safety device in HVAC systems that detects the pressure of the refrigerant. This switch is used in air conditioners and heat pumps and turns on when the refrigerant pressure is below 40 PSI and turns off when the pressure rises above 15 PSI. Thus, Low-Pressure Switch ’reads’ these pressure levels and, as a result, saves the compressor from the dangerous effect of low refrigerant levels, which in due course leads to the compressor overheating and mechanical destruction.