Goodman HVAC Error Code 13: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
13
Brand
Goodman
Product Type
hvac
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Goodman error code 13 indicates that the liquid line temperature sensor on your air conditioner is open or faulty. This sensor monitors the temperature of the liquid refrigerant line, and when it fails, the system may shut down or run inefficiently. This guide will help you diagnose and fix the issue safely.
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Tools You'll Need

How to Fix Error Code 13

  1. Turn Off Power to the Unit

    Severe shock hazard. Always verify power is off with a multimeter before touching any components.

  2. Locate the Liquid Line Temperature Sensor

  3. Inspect the Wiring and Connections

  4. Test the Sensor with a Multimeter

    Avoid touching the sensor tip with bare hands, as oils can affect readings.

  5. Replace the Sensor if Faulty

    Use only a compatible sensor from an HVAC supplier (generic part: liquid line temperature sensor).

  6. Restore Power and Test the System

    If error returns or system behaves abnormally, turn off power and call a professional.

Parts You May Need

Liquid line temperature sensor
Check Price on Amazon
Liquid line temperature sensor
Check Price on Amazon
Liquid line temperature sensor
Check Price on Amazon
Liquid line temperature sensor
Check Price on Amazon
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When to Call a Professional

If the sensor replacement does not clear the error code, or if you are uncomfortable working with electrical components, contact a licensed HVAC technician. Also, if the control board appears damaged or you suspect other issues, professional diagnosis is recommended.

Frequently Asked Questions

What causes Goodman error code 13?
Error code 13 is triggered when the liquid line temperature sensor circuit is open. This can be due to a faulty sensor, broken wiring, or a loose connection.
Can I bypass the liquid line temperature sensor?
No, bypassing the sensor can cause the system to operate without proper monitoring, leading to potential damage. Always replace a faulty sensor.
How much does it cost to fix error code 13?
DIY cost is about $20-50 for a replacement sensor. Professional service calls range from $150-300 including parts and labor.
Where is the liquid line temperature sensor located?
It is usually clamped to the liquid line (smaller copper pipe) near the outdoor condenser coil. Follow the wires from the control board to locate it.
Will error code 13 cause the AC to stop cooling?
Yes, the system may shut down or limit operation to prevent damage when the sensor is faulty, resulting in no cooling.

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