Pneumatic Versatility: The 4-way

and electrical cover to facilitate immediate field installation

you maintain the system's UL/CSA rating and ensure the logical sequence of operations—from ignition control to pump activation—remains as the manufacturer intended

When you're servicing Type Q or BQ thermostatic expansion valves

It features a precision-machined 1-inch bore and a standard 1/4" x 1/8" keyseat

Laars Heating Systems RE2344301 Control Refrigerant Pneumatic Versatility: The 4-wayThe Laars RE2344301 is a critical PCB Temperature Control Module engineered specifically for high demand hydronic systems. As a genuine Laars HVAC replacement part, this electronic control board provides the precise logic required to manage boiler firing sequences and maintain tight temperature setpoints. Designed for exact fit compatibility with MightyTherm2 series units (including 200 thru 400 models), it replaces aging or failed modules to restore