Lennox 12L21 Pressure Switch 320735-701 and thermopile relative to the

and thermopile relative to the main burner port

Built to handle a working pressure of 150 PSI

The unit’s compression fittings facilitate secure 1/4" OD tubing connections

it is specifically optimized for the control logic and safety sequences of York-manufactured equipment

Lennox 12L21 Pressure Switch 320735-701 and thermopile relative to theAs a seasoned technician, you know that safeguarding the compressor from low side pressure drops is critical for system longevity. The Lennox 12L21 Pressure Switch is an OEM low pressure safety switch meticulously calibrated to monitor refrigerant levels and prevent vacuum conditions or evaporator freeze ups. Designed for integration into Lennox HVAC systems, including high efficiency condensing units and heat pumps, this Normally Open (NO) switch