What are the specs for this Piston?

The correct replacement for Goodman model GSC130484AB AC — B1789882 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 GSC130484AB AC — B1789882.

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 Flow Control Piston Kit for GSC130484AB AC — B1789882

Name: OEM Goodman Flow Control Piston Kit for GSC130484AB AC — B1789882
Brand: Goodman
SKU: GOODMAN-780
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-780 Brand: Goodman

$10.95 $14.78

OEM Guaranteed

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30-Day Returns

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Texas CMBL #19328542014

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The Goodman B1789882 Flow Control Piston Kit is a genuine OEM refrigerant metering device engineered for the GSC130484AB 13 SEER air conditioner and other compatible Goodman condensing units. The piston (orifice) regulates the flow of refrigerant into the evaporator coil, and using the correct factory-specified bore size is essential for proper subcooling, capacity, and efficiency. An incorrect orifice can cause flooding, frost-back, or poor cooling performance.

Specifications

OEM Part Number: B1789882
Type: Fixed-bore flow control piston / orifice kit
Brand: Goodman
Equipment: Air Conditioner (condensing unit)
Primary Fit: GSC130484AB (4-ton, 13 SEER)
Material: Brass orifice body with retaining components

OEM vs. Generic

The genuine Goodman piston is bored to the exact specification your system was charged and rated for, guaranteeing matched capacity and warranty compliance. Generic universal piston assortments require you to identify and swap the correct bore yourself, introducing the risk of a mismatch. For a direct, worry-free replacement we recommend the OEM B1789882.

Installation Difficulty

Moderate — Requires recovering the refrigerant charge, brazing or accessing the liquid line at the metering device, replacing the piston, then pulling a vacuum and recharging. This service should be performed by an EPA-certified HVAC technician.

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 Flow Control Piston ...

$10.95

Frequently Asked Questions

Does this Piston fit my Goodman GSC130484AB AC — B1789882?

Yes. This is the factory-specified OEM piston for the Goodman GSC130484AB AC — B1789882. 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 GSC130484AB AC — B1789882?

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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