As a furnace air pressure switch

technicians can initiate a test sequence by shorting the "Test" pins on the board

The McDonnell & Miller G-4-SS Probe Rod (Part Number 179158) is a high-grade 316 stainless steel grounding electrode engineered for demanding liquid level control applications in steam and hot water boiler systems

always check for condensate backup or restricted venting

this unit is designed specifically for high voltage heating systems

Sporlan 206835P Side Connector 30067439-890 As a furnace air pressureThe Sporlan 206835P, also known as the ASC 7 4 auxiliary side connector, is a critical component for contractors managing complex refrigerant flow in commercial and residential systems. Designed specifically for integration with Sporlan refrigerant distributors (types 1112 and 1113), this brass connector allows for the addition of hot gas bypass, hot gas defrost, or reverse cycle capabilities to systems using standard distributors without built in