Amana-Goodman B1789853 Piston Kit

The Amana-Goodman B1789853 is a precision-engineered fixed orifice piston kit designed for 13 SEER residential air conditioning and heat pump systems. This kit serves as the direct replacement for B1789855, ensuring seamless integration into legacy and current production Goodman, Amana, and Janitrol evaporator coils. As a critical component of the refrigerant metering device, this 0.053 piston accurately regulates flow into the evaporator, maintaining optimal system pressures and efficiency levels. Technicians should verify orifice sizing against the manufacturer’s charging charts to prevent liquid slugging or evaporator freeze-ups. Constructed from high-grade brass to resist corrosion and wear, the B1789853 flowrater piston is essential for restoring factory-standard performance in R-22 or R-410A systems originally spec'd for this bore size. Utilizing OEM HVAC replacement parts like the B1789853 ensures the refrigeration cycle operates within the tight tolerances required for 13 SEER HVAC systems.

• Direct OEM Replacement: Replaces discontinued part number B1789855 without requiring modification to the liquid line or distributor.
• Optimized Metering: Critical for maintaining the correct superheat and subcooling parameters in fixed orifice HVAC systems.
• High-Durability Construction: Machined brass design ensures longevity and prevents internal bypass leakages.
• Universal Compatibility: Fits standard Goodman and Amana flowrater assemblies across multiple indoor coil configurations.

Is the B1789853 compatible with R-410A systems?
Yes, this piston kit is compatible with various refrigerants, provided the BTU capacity and SEER rating of the system match the 0.053 orifice specification found in the unit's technical manual.

Can I use the B1789853 to replace a B1789855?
Yes, the B1789853 is the official engineering update and direct substitute for the B1789855 part number.

Does this kit include the Teflon ring?
This kit is the individual fixed orifice piston; most technicians reuse the existing housing, but compatibility with standard Goodman flowrater bodies is guaranteed.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.