What are the specs for this Piston Kit?

The correct replacement for Goodman model ASZ130361AB — B1789868 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 ASZ130361AB — B1789868.

What symptoms indicate I need a new piston kit?

Common symptoms that indicate you need a new piston kit 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 kit 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 / Flowrator Kit for ASZ130361AB — B1789868

Name: OEM Goodman Piston / Flowrator Kit for ASZ130361AB — B1789868
Brand: Goodman
SKU: GOODMAN-16227
Price: 14.95 USD
Availability: InStock

SKU: GOODMAN-16227 Brand: Goodman

$14.95 $19.95

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Goodman B1789868 Piston (Flowrator) Kit

The Goodman B1789868 is a factory-original refrigerant metering piston kit for the ASZ130361AB and compatible Goodman/Amana heat pumps. The piston (also called a flowrator or orifice) sits at the indoor or outdoor coil and precisely meters refrigerant flow to match the system's rated capacity. Because heat pumps reverse between heating and cooling, using the correctly drilled piston is essential to proper subcooling, superheat, and efficiency. Installing the wrong bore size can starve or flood the coil and quietly wreck system performance.

Specifications

OEM Part Number: B1789868
Type: Fixed-orifice refrigerant metering piston / flowrator
Fits: Goodman & Amana ASZ130361AB heat pump (and matched coil combinations)
Bore: Factory-calibrated to the unit's rated tonnage
Includes: Piston element for the metering device housing

OEM vs. Generic

The OEM Goodman piston is drilled to the exact factory bore diameter for this equipment match, guaranteeing correct refrigerant charge and efficiency. Generic assortment pistons force the tech to guess the bore and risk capacity and reliability problems. At this price, OEM removes all doubt.

Installation Difficulty

Advanced (4/5). Requires recovering refrigerant, opening the metering device, swapping the piston, then evacuating and recharging the system. This is EPA 608–certified technician work — not a DIY job.

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 / Flowrator K...

$14.95

Frequently Asked Questions

Does this Piston Kit fit my Goodman ASZ130361AB — B1789868?

Yes. This is the factory-specified OEM piston kit for the Goodman ASZ130361AB — B1789868. 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 kit on my Goodman ASZ130361AB — B1789868?

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 kit?

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

Is this piston kit 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 kit?

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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