Laars Heating Systems 2400-228 Pressure Switch 322838-754 always check the system requirements

always check the system requirements during a retrofit

Can a dirty air filter cause this limit switch to trip

and mounting bolts

Precise Refrigerant Control: Optimizes R-410A flow to maintain target superheat and evaporator efficiency

Laars Heating Systems 2400-228 Pressure Switch 322838-754 always check the system requirementsThe Laars Heating Systems 2400 228 Pressure Switch is a critical safety component designed for precise draft monitoring and combustion air verification in high efficiency hydronic systems. This OEM replacement part, also identified as the Pressure Switch Mark II, is engineered specifically for compatibility with Laars Mark II H Series residential and commercial boilers, including models H, HW, and HP (sizes 60 130). As a normally open switch, it