What are the specs for this Piston?

The correct replacement for Goodman model GSC130483BA — B1789888 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 GSC130483BA — B1789888.

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 Check Piston Kit for GSC130483BA — B1789888

Name: OEM Goodman Flow Check Piston Kit for GSC130483BA — B1789888
Brand: Goodman
SKU: GOODMAN-774
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-774 Brand: Goodman

$10.95 $14.78

OEM Guaranteed

Same-Day Ship

30-Day Returns

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Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

The Goodman B1789888 Flow Check Piston Kit is the genuine OEM refrigerant metering device for the GSC130483BA condensing unit and matched indoor coils. The flow check piston (fixed orifice) controls refrigerant flow into the evaporator coil, ensuring correct system charge balance and cooling capacity. A worn, clogged, or incorrectly sized piston causes poor cooling, frosting, and pressure imbalances — installing the factory-spec orifice restores rated performance.

Specifications

OEM Part Number: B1789888
Fits Model: GSC130483BA
Type: Flow check piston / fixed orifice kit
Function: Refrigerant metering device
Includes: Piston and seal hardware
Brand: Goodman

OEM vs. Generic

This genuine Goodman OEM piston kit is bored to the precise orifice size matched to the GSC130483BA's tonnage and coil pairing. Generic pistons with the wrong bore diameter will misfeed the coil and degrade efficiency. OEM guarantees the correct metering rate for proper superheat and subcooling.

Installation Difficulty

Difficulty: Advanced. Installation requires recovering refrigerant, opening the liquid-line connection at the indoor coil, swapping the piston, and re-evacuating and recharging the system. This is EPA-certified technician work — improper handling of refrigerant is unsafe and illegal for unlicensed individuals. Plan for 1–2 hours.

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 Check Piston Ki...

$10.95

Frequently Asked Questions

Does this Piston fit my Goodman GSC130483BA — B1789888?

Yes. This is the factory-specified OEM piston for the Goodman GSC130483BA — B1789888. 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 GSC130483BA — B1789888?

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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