What are the specs for this Piston?

The correct replacement for Goodman model SSX140241AA — 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 SSX140241AA — 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 / Flowrator Kit for SSX140241AA — B1789857

Name: OEM Goodman Piston / Flowrator Kit for SSX140241AA — B1789857
Brand: Goodman
SKU: GOODMAN-854
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-854 Brand: Goodman

$10.95 $14.78

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Goodman B1789857 Piston Kit

This genuine OEM Goodman B1789857 piston kit (refrigerant flowrator) is a direct-fit metering device for the SSX140241AA 2-ton air conditioner condensing unit. The piston meters refrigerant flow into the coil to maintain proper system charge and pressures, which is essential for correct cooling capacity and efficiency. The factory-sized orifice in this kit is matched to the system, so installing the correct OEM piston is critical to performance.

Specifications

OEM Part Number: B1789857
Part Type: Piston / Flowrator (refrigerant metering device)
Compatible Model: SSX140241AA
Equipment: Goodman Air Conditioner Condenser
Function: Meters refrigerant flow to the coil
Includes: Piston and seal hardware

OEM vs. Generic

This authentic Goodman OEM piston is bored to the exact factory orifice size for the SSX140241AA. Generic pistons may carry the right physical body but an incorrect bore, which leads to improper charge, poor cooling, and reduced efficiency. For correct system performance, always use the OEM-specified piston.

Installation Difficulty

Advanced — Professional Recommended. Replacing the piston requires opening the sealed refrigerant circuit, so recovery, evacuation, and recharging by an EPA 608–certified technician are required. This is not a DIY repair. Typical professional time: 1–2 hours. Improper handling can damage the system and violates refrigerant-handling regulations.

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...

$10.95

Frequently Asked Questions

Does this Piston fit my Goodman SSX140241AA — B1789857?

Yes. This is the factory-specified OEM piston for the Goodman SSX140241AA — 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 SSX140241AA — 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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