What are the specs for this Piston Kit?

The correct replacement for Goodman model ANZ130241AC — 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 ANZ130241AC — B1789857.

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 Refrigerant Piston Kit for ANZ130241AC — B1789857

Name: OEM Goodman Refrigerant Piston Kit for ANZ130241AC — B1789857
Brand: Goodman
SKU: GOODMAN-15151
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-15151 Brand: Goodman

$5.95 $7.95

OEM Guaranteed

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30-Day Returns

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Texas CMBL #19328542014

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Govt POs Accepted

The Goodman B1789857 Piston (Flow Restrictor) Kit is a genuine OEM refrigerant metering device sized as an exact-fit replacement for the ANZ130241AC heat pump. The piston seats inside the liquid line orifice housing and meters refrigerant flow into the coil during cooling, while allowing free bypass flow in heating mode. Using the correct piston bore is critical: an oversized or undersized orifice will flood or starve the coil, killing capacity and efficiency.

Specifications

Part Number: B1789857
Type: Refrigerant metering piston / flow restrictor
Equipment: Heat Pump
Fit: ANZ130241AC and compatible Goodman/Amana systems
Bore: Factory-matched to unit tonnage
Includes: Piston insert (Teflon seal check before install)

OEM vs. Generic

The factory Goodman piston is drilled to the precise bore your condenser and coil were rated with. Generic pistons are sold in bore ranges that may be a step off, leaving your system slightly under- or over-fed. For a low-cost part with outsized impact on performance, the exact OEM bore is the right call.

Installation Difficulty

Advanced — HVAC technician required. Access requires recovering refrigerant, opening the liquid-line orifice housing, swapping the piston, then evacuating and recharging to spec. EPA Section 608 certification is required for refrigerant work.

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 Refrigerant Piston K...

$5.95

Frequently Asked Questions

Does this Piston Kit fit my Goodman ANZ130241AC — B1789857?

Yes. This is the factory-specified OEM piston kit for the Goodman ANZ130241AC — 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 kit on my Goodman ANZ130241AC — 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 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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