Goodman HVAC Error Code 19: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
19
Brand
Goodman
Product Type
hvac
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code 19 on your Goodman AC system indicates that the return air temperature sensor is open — meaning the sensor circuit is broken or not reading correctly. This sensor monitors the temperature of air returning to the furnace, and when it fails, your system may run inefficiently or shut down. Follow these steps to diagnose and fix the issue.
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Tools You'll Need

How to Fix Error Code 19

  1. Turn Off Power

    Always shut off power before working on HVAC equipment. High voltage capacitors can cause serious injury.

  2. Locate the Return Air Sensor

  3. Inspect Sensor Wires and Connection

  4. Test the Sensor with a Multimeter

    Handle the multimeter probes carefully to avoid electric shock. Ensure power is off.

  5. Replace the Faulty Sensor

    Order the correct replacement sensor for your Goodman model. Using a wrong type can cause system malfunction.

  6. Restore Power and Test

Parts You May Need

Return air temperature sensor
Check Price on Amazon
Return air temperature sensor
Check Price on Amazon
Return air temperature sensor
Check Price on Amazon
Return air temperature sensor
Check Price on Amazon
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When to Call a Professional

Call a professional HVAC technician if: you are uncomfortable working with electrical components, the multimeter reading suggests infinite resistance but new sensor doesn't fix it, or you suspect a damaged control board.

Frequently Asked Questions

What does error code 19 mean on a Goodman AC?
Error code 19 means the return air temperature sensor is open — i.e., the sensor is not sending a signal due to a broken circuit.
Where is the return air temperature sensor located on a Goodman furnace?
It is typically mounted near the return air filter or inside the return air duct, close to the furnace or air handler.
Can I bypass the return air sensor to clear error 19?
No, bypassing the sensor will cause improper operation. The sensor is necessary for the system to regulate temperature correctly.
How much does it cost to fix Goodman error code 19?
DIY cost is about $10-$30 for a replacement sensor. Hiring a pro typically costs $100-$200 including labor.
Will error code 19 clear itself after replacing the sensor?
Yes, after installing a new sensor and restoring power, the error should clear automatically. If not, there may be another issue.

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