d2
Goodman High Discharge or Head Pressure Detected

Goodman communicating thermostat shows d2 and system may shut down on high pressure

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Dirty condenser coil, Failed condenser fan motor, Overcharged refrigerant system, Blocked liquid line or TXV

How to Fix / Troubleshooting

Safety first: Turn off power at the outdoor disconnect before cleaning or working near the fan.

Steps to check:

  • 1. Clean outdoor coil: Remove debris and rinse the Goodman condenser coil from inside out with low-pressure water.
  • 2. Verify fan operation: Restore power and call for cooling. Confirm the fan runs smoothly. If not, the fan motor or capacitor may need replacement.
  • 3. Check clearance: Ensure adequate space around the unit for proper airflow.

When to call a professional: Persistent d2 indicates a refrigerant or mechanical issue that requires gauges and professional diagnosis.

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Repair Difficulty

Medium 3/5

Required Part

Condenser coil or condenser fan motor
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