Goodman Loss of Cooling / Reversing Valve or Refrigerant Issue

Goodman air conditioner produces warm air from vents instead of cool air

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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

Outdoor condenser not running (fan and compressor off), Reversing valve stuck in heat mode on heat pump, Low refrigerant charge, Failed compressor

How to Fix / Troubleshooting

Safety first: Turn off power before opening panels. Do not attempt to adjust refrigerant yourself.

Steps to check:

  • 1. Check outdoor unit operation: When the thermostat calls for cooling, verify that the Goodman outdoor unit fan and compressor are running. If not, see earlier entries on no-start conditions.
  • 2. Verify thermostat mode: Ensure the thermostat is not accidentally set to HEAT or EMERGENCY HEAT.
  • 3. Heat pump reversing valve test: On heat pump models, switch between HEAT and COOL and listen for a click at the outdoor unit. No change may indicate a stuck reversing valve or coil issue.

When to call a professional: Warm air issues often require a technician to check refrigerant pressures, reversing valve operation, and compressor performance.

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Repair Difficulty

Medium 3/5

Required Part

Reversing valve or compressor
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