What are the specs for this Piston?

The correct replacement for Goodman model ASZ130241AE Heat Pump — B1789857 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Goodman equipment which lists the model number ASZ130241AE Heat Pump — B1789857.

What symptoms indicate I need a new piston?

Common symptoms that indicate you need a new piston include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this piston compatible with Bryant or Payne systems too?

Many Goodman parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

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Goodman

OEM Goodman Piston Kit for ASZ130241AE Heat Pump — B1789857

Name: OEM Goodman Piston Kit for ASZ130241AE Heat Pump — B1789857
Brand: Goodman
SKU: GOODMAN-16169
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-16169 Brand: Goodman

$5.95 $7.95

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OEM Goodman B1789857 Piston Kit

The B1789857 piston (flow-control/metering orifice) sets the refrigerant flow rate on the Goodman ASZ130241AE 13 SEER, 2-ton heat pump. The precisely drilled orifice restricts liquid refrigerant into the coil to create the pressure drop needed for proper evaporation and system capacity. Using the correct piston size is critical to reaching rated efficiency and correct superheat/subcooling — an undersized or oversized bore starves or floods the coil.

Specifications

Fits: Goodman ASZ130241AE heat pump; verify bore against the unit rating plate
Part type: Refrigerant metering piston / flow-control orifice
OEM Part Number: B1789857
Function: Meters liquid refrigerant to the coil
Installation: Seats inside the factory piston housing

OEM vs. Generic

Generic piston assortments require you to guess the correct bore, and an incorrect size directly hurts capacity and efficiency. The OEM B1789857 is the exact orifice specified for this platform, so the system charges and performs to Goodman's published ratings.

Install Difficulty

Professional (4/5). Requires refrigerant recovery, opening the metering-device housing, seating the piston, then evacuating and recharging. Best performed by an EPA-certified technician during a coil or airflow service.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

OEM Goodman Piston Kit for ASZ13...

$5.95

Frequently Asked Questions

Does this Piston fit my Goodman ASZ130241AE Heat Pump — B1789857?

Yes. This is the factory-specified OEM piston for the Goodman ASZ130241AE Heat Pump — B1789857. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the piston on my Goodman ASZ130241AE Heat Pump — B1789857?

Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.

What symptoms mean I need a new piston?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this piston compatible with Bryant or Payne too?

Many Goodman parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Goodman piston?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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