Featuring a 1/2" NPT connection and a robust aluminum die-cast housing

this HVAC vacuum switch is the primary solution for resolving pressure switch lockout codes

and Quaker furnaces

With an Open Drip Proof (ODP) enclosure and Class B insulation

Advanced Distributor Products 76739700 Limit Switch 328140-751 Featuring a 1/2" NPT connectionThe Advanced Distributor Products 76739700 Limit Switch is a critical safety component engineered for ADP series heating units and unit heaters. This high precision HVAC limit control, specifically the L175 30F model, is designed to monitor and regulate internal temperatures to prevent equipment overheating. Operating within a 110 120V range, this thermal limit switch features a 175F opening (cut out) temperature and a 145F closing (cut in)