Whether you are servicing a PTC or PTH series unit

When performing a Robertshaw 705-452 field conversion

Rugged Reliability: Engineered for high-cycle industrial environments with a robust solenoid mechanism

Can this be used on both residential and commercial York units

eccentric friction lock to the blower shaft

Robertshaw 720-474 Valve R-410A Whether you are servicing aThe Robertshaw 720 474 is a professional grade 24V dual gas valve engineered for high demand residential and commercial heating applications. As a direct 7200ERCS 1 replacement, this six function control integrates a manual valve, safety shut off magnet, dual automatic valves, and a built in pilot adjustment into a singular, compact manifold. This step opening gas valve is factory set for natural gas (3. 5" WC) but includes a field convertible LP gas