What are the specs for this Piston Kit?

The correct replacement for Goodman model GMPV100-3 Furnace — B1789868 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 GMPV100-3 Furnace — B1789868.

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 Piston Kit for GMPV100-3 Furnace — B1789868

Name: OEM Goodman Piston Kit for GMPV100-3 Furnace — B1789868
Brand: Goodman
SKU: GOODMAN-12145
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-12145 Brand: Goodman

$5.95 $7.95

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Texas CMBL #19328542014

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The Goodman B1789868 Piston Kit is a genuine OEM replacement designed for the GMPV100-3 gas furnace and compatible Goodman/Amana models. The piston (orifice) meters the precise flow of gas to the burners, and using the correct orifice size is critical for safe, efficient combustion and proper flame characteristics.

Specifications

OEM Part Number: B1789868
Part Type: Piston / Burner Orifice Kit
Brand: Goodman
Equipment: Gas Furnace
Primary Fit: GMPV100-3
Material: Machined brass

OEM vs. Generic

The OEM Goodman B1789868 is factory-drilled to the exact orifice diameter specified for your furnace's BTU rating and fuel type, guaranteeing correct gas metering and warranty compliance. A quality generic equivalent offers a budget-friendly alternative with comparable dimensions, though we recommend verifying the drill size against your original before installation. Both options are dependable, but the OEM kit is the safest choice for exact combustion performance.

Why It Fails

Orifices can become clogged with debris or corrosion over time, causing weak or uneven flames, delayed ignition, or sooting. Replacing the piston kit restores the manufacturer-specified gas flow.

Installation Difficulty: Easy

This is a straightforward replacement for a technician or handy homeowner. Shut off gas and power, remove the burner assembly, swap the orifice, and reassemble. Always have gas connections leak-checked after service. Estimated time: 20–30 minutes. Professional installation is recommended for any gas appliance 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 Piston Kit for GMPV1...

$5.95

Frequently Asked Questions

Does this Piston Kit fit my Goodman GMPV100-3 Furnace — B1789868?

Yes. This is the factory-specified OEM piston kit for the Goodman GMPV100-3 Furnace — B1789868. 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 GMPV100-3 Furnace — B1789868?

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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