What are the specs for this Piston?

The correct replacement for Goodman model SSX140601AC — 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 SSX140601AC — 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 SSX140601AC — B1789888

Name: OEM Goodman Flow Check Piston Kit for SSX140601AC — B1789888
Brand: Goodman
SKU: GOODMAN-878
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-878 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 a genuine OEM refrigerant metering device for the Goodman SSX140601AC 14 SEER condensing unit. The flow check piston (orifice) controls refrigerant flow into the evaporator coil, ensuring proper expansion and system charge balance. A correctly sized piston is essential for rated cooling capacity and efficiency.

Specifications

OEM Part Number: B1789888
Part Type: Flow Check Piston / Metering Orifice Kit
Brand: Goodman
Compatible Model: SSX140601AC (5-ton, 14 SEER A/C)
Function: Refrigerant metering device
Fit: Factory-specified bore size for this system

OEM vs. Generic

The genuine Goodman OEM piston is bored to the exact orifice size matched to the SSX140601AC's coil and capacity. Using the wrong orifice size — common with generic kits — causes overfeeding or starving of the coil, poor cooling, and possible compressor damage. With metering devices, the correct size is non-negotiable.

Installation Difficulty

Professional recommended. Although the piston itself is simple to swap, the job requires recovering and recharging refrigerant and brazing/sealing the line set, which must be done 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 Check Piston Ki...

$10.95

Frequently Asked Questions

Does this Piston fit my Goodman SSX140601AC — B1789888?

Yes. This is the factory-specified OEM piston for the Goodman SSX140601AC — 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 SSX140601AC — 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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