Advanced Distributor Products 176799984 Piston Orifice 318423-701 System Protection: Acts as a

System Protection: Acts as a primary safety to prevent air and moisture from being drawn into the system during a leak

replacing a failed interface with this OEM HVAC control board prevents erratic system behavior and maintains the factory-defined operational parameters required for long-term unit integrity

"chattering" under load

the Rheem-Ruud 42-21593-02 Sequencing Relay functions as a critical OEM control component

preventing common combustion errors like INFO #6 32 lockouts

Advanced Distributor Products 176799984 Piston Orifice 318423-701 System Protection: Acts as aThe Advanced Distributor Products 176799984 Piston Orifice is a high precision HVAC expansion device engineered to regulate refrigerant flow within your cooling system. Specifically designed as a #84 R22 piston orifice, this critical component ensures the optimal pressure drop required for efficient heat exchange. As a direct replacement for 100000045, this orifice provides a seamless fit for compatible ADP and Lennox evaporator coils, restoring