What are the specs for this Piston Kit?

The correct replacement for Goodman model GMPN080-4 — 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 GMPN080-4 — B1789882.

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 Furnace Piston Orifice Kit for GMPN080-4 — B1789882

Name: OEM Goodman Furnace Piston Orifice Kit for GMPN080-4 — B1789882
Brand: Goodman
SKU: GOODMAN-12082
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-12082 Brand: Goodman

$5.95 $7.95

OEM Guaranteed

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Texas CMBL #19328542014

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The Goodman B1789882 Piston Kit is a genuine OEM set of metering restrictors (orifices) engineered for GMPN080-4 gas furnaces. Precisely sized pistons control the gas flow rate to each burner, ensuring a clean, correctly proportioned flame and rated BTU output. Using the factory-specified piston is essential for safe combustion and efficient heating.

Specifications

Part Number: B1789882
Type: Piston / orifice metering kit
Material: Machined brass
Fits: Goodman GMPN080-4 furnaces
Function: Meter gas flow for proper burner input and flame

OEM vs. Generic

Orifice sizing is a precision matter — even a few thousandths of an inch changes the gas input and flame characteristics. The genuine B1789882 is drilled to Goodman's exact specification for the GMPN080-4, so you get the correct BTU rate out of the box. Generic pistons may be mislabeled or inconsistently bored, risking over- or under-firing, sooting, or a lifted flame. Stick with OEM for a safe, code-compliant result.

Installation Difficulty

Moderate (2 of 3). Replacing pistons requires shutting off the gas, disconnecting the burner/manifold assembly, and swapping the orifices — work best performed by an HVAC technician who can verify manifold pressure and flame after reassembly. Always leak-check every joint before returning the furnace to service.

Order the authentic Goodman B1789882 piston kit to restore proper gas metering and a clean burner flame in your GMPN080-4 furnace.

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 Furnace Piston Orifi...

$5.95

Frequently Asked Questions

Does this Piston Kit fit my Goodman GMPN080-4 — B1789882?

Yes. This is the factory-specified OEM piston kit for the Goodman GMPN080-4 — 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 kit on my Goodman GMPN080-4 — 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 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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