What are the specs for this Heat Exchanger?

The correct replacement for Goodman model GMP075-3 Furnace — 2921306S 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 GMP075-3 Furnace — 2921306S.

What symptoms indicate I need a new heat exchanger?

Common symptoms that indicate you need a new heat exchanger include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this heat exchanger 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 Heat Exchanger for GMP075-3 Furnace — 2921306S

Name: OEM Goodman Heat Exchanger for GMP075-3 Furnace — 2921306S
Brand: Goodman
SKU: GOODMAN-11846
Price: 574.95 USD
Availability: InStock

SKU: GOODMAN-11846 Brand: Goodman

$574.95 $749.95

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Texas CMBL #19328542014

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The Goodman 2921306S Heat Exchanger is the genuine OEM heat-transfer assembly for the Goodman GMP075-3 gas furnace. The heat exchanger is the heart of the furnace: combustion heats its steel passages while the blower moves conditioned air across the exterior, keeping flue gases fully separated from the air you breathe. A cracked or rusted-through heat exchanger is a carbon-monoxide hazard and warrants immediate replacement with a factory part.

Specifications

OEM Part Number: 2921306S
Fits Model: GMP075-3
Brand: Goodman
Category: Heat Exchanger
Equipment Type: Gas Furnace (75,000 BTU class)
Material: Aluminized/coated steel clamshell

OEM vs. Generic

This Goodman OEM heat exchanger is manufactured to the precise metallurgy, section spacing, and flange dimensions of the GMP075-3. Because the heat exchanger governs combustion containment, we do not recommend generic substitutes — an imperfect fit can alter flame impingement and dramatically shorten service life. Many manufacturers also require the OEM part to honor limited warranty coverage.

Installation Difficulty

Advanced / Professional only. This is a major repair requiring near-complete furnace teardown, gas and electrical disconnection, and post-install combustion and CO testing. Installation must be performed by a licensed 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 Heat Exchanger for G...

$574.95

Frequently Asked Questions

Does this Heat Exchanger fit my Goodman GMP075-3 Furnace — 2921306S?

Yes. This is the factory-specified OEM heat exchanger for the Goodman GMP075-3 Furnace — 2921306S. 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 heat exchanger on my Goodman GMP075-3 Furnace — 2921306S?

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 heat exchanger?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this heat exchanger 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 heat exchanger?

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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