Armstrong Fluid Technology 207936-300 Valve 340155-7024 or a failing blower motor

or a failing blower motor that isn't pulling enough CFM across the heat exchanger

the part needs replacement

while the high-side handles cut-out setpoints from 100 psi to 450 psi

Rollout Switch is engineered to detect excessive temperatures in the burner compartment

While the 26

Armstrong Fluid Technology 207936-300 Valve 340155-7024 or a failing blower motorThe Armstrong Fluid Technology 207936 300 Valve is a precision engineered water pressure reducing valve designed for high performance fluid management in commercial and residential HVACR systems. Known as the Model HRD 70, this brass pressure regulator features a 3 4" Female NPT inlet and outlet, making it an essential component for maintaining system integrity. Optimized for pressure reduction, it handles a 150 PSI Max Inlet Pressure with a versatile