Goodman Furnace Heat Exchanger Replacement

Goodman Furnace Gas Burner Control Valve and Heat Exchanger Parts

Goodman furnaces are built for value and reliability, and when gas flow or combustion issues arise, the gas valve, igniter, and heat exchanger are the critical parts to inspect first. These parts work together to safely ignite gas, maintain proper flame, and transfer heat into your home — when one fails, your furnace either won't heat or shuts down unexpectedly.

Whether you're troubleshooting a no-heat situation, a furnace that ignites then immediately shuts off, or low heat output, finding the exact OEM part for your Goodman model is essential. Our Goodman gas valve and control part parts are sourced directly from the manufacturer and come ready to install.

• Gas valve assembly won't open: No gas flow after ignition; check 24V at valve terminals first, then replace if power is present
• Igniter glows orange but gas doesn't light: Flame sensor may be dirty or failed; clean with fine steel wool first, then replace the sensor or igniter if needed
• Furnace ignites then shuts down in seconds: Flame sensor has lost signal; very common on Goodman GMVC and GMSS models
• Low heat or incomplete combustion: Gas valve pressure or mixture is off; heat exchanger blockage can also restrict airflow
• Visible rust or corrosion on heat exchanger: Heat exchanger integrity compromised; cracked exchanger is a safety and CO risk — this is a major repair

Goodman Furnace Gas Burner and Control Parts — Frequently Asked Questions

What's the difference between a Goodman gas valve and a universal gas valve?

Goodman furnaces typically use Honeywell or White-Rodgers gas valves tuned to specific inlet and outlet pressures. A universal valve may fit physically but will not maintain the correct gas pressure or flow rate for your Goodman model. Always use the OEM valve for your exact model — mismatch can cause incomplete combustion, yellow flames, or no ignition at all. Enter your Goodman model number to find the correct valve assembly.

How do I know if my igniter or flame sensor is the problem?

If the igniter glows orange (or red) but the gas valve never opens, the flame sensor is likely the culprit. If the igniter doesn't glow at all, the igniter itself has failed. A dirty flame sensor (carbon buildup) often looks failed — try cleaning it gently with fine steel wool first. If cleaning doesn't restore ignition after 2 to 3 attempts, replace the sensor. Goodman igniters are consistent sellers because they're inexpensive ($15 to $40) and a common first repair on 5 to 10-year-old Goodman furnaces.

Can I replace just the heat exchanger, or do I need to replace the whole furnace?

A cracked heat exchanger is one of the most expensive furnace repairs — often $400 to $800 in labor plus parts. On budget Goodman models, repair cost sometimes exceeds replacement value. However, if your furnace is less than 10 years old and otherwise sound, an OEM heat exchanger replacement is a valid repair. Consult a licensed HVAC tech to inspect the crack severity — small surface cracks can sometimes be monitored, but through-cracks require replacement for safety (carbon monoxide risk).

Where do I find my Goodman furnace model number to get the right gas valve and controls?

Your model number is on the data plate inside the furnace cabinet, usually on the right side or near the blower. It starts with GMVC, GMSS, GCVC, or GMS. Write down the full model number — that's what you need to look up the correct gas valve, igniter, flame sensor, and control board. Use Repair Clinic's model lookup to confirm compatibility before ordering.

Order Goodman Furnace Heat Exchanger Parts Online

Shop for Goodman furnace heat exchanger parts online and confidence. At Repair Clinic, we offer a full range of genuine OEM replacement parts with the assurance of our Price Match Guarantee, helping you shop with confidence available. Find the exact part you need by using our convenient lookup tool, where you can search by model or part number. With same-day shipping on orders placed by 9:00 p.m., you'll have your Goodman furnace running smoothly again in no time. Whether you're a DIY enthusiast or a professional technician, our customer support team is here to assist you. Visit Repair Clinic to order your furnace parts today and ensure your Goodman furnace operates at peak efficiency.

Goodman Furnace Model Number: Where to Look

Goodman furnaces typically place the model number on a data plate inside the cabinet, often on the blower compartment door or near the blower. Turn off power before opening an access panel, then copy the complete identifier, including every letter and number. Type it into our model number lookup and the catalog narrows to parts made for your unit. This model-based search applies across your furnace's associated parts, not just the heat exchanger or controls. Matching the full number helps you skip incompatible specifications and get the repair moving faster.