F2
Goodman
Outdoor Ambient Temperature Sensor Fault
Goodman inverter or mini-split shows F2 and cooling/heating is disabled
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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
Failed outdoor ambient thermistor, Broken sensor wiring, Sensor not mounted correctly on outdoor unit, Faulty outdoor PCB sensor input
How to Fix / Troubleshooting
Safety first: Turn off power at the outdoor disconnect and breaker.
Steps to check:
- 1. Locate ambient sensor: On Goodman condensers, the ambient thermistor is usually clipped near the outdoor coil or on the unit frame, exposed to outdoor air.
- 2. Inspect sensor and wires: Look for cracked sensor housing, chewed wires, or corrosion. Ensure the connector to the outdoor PCB is secure.
- 3. Confirm mounting: The sensor should be in free air, not touching hot discharge lines or directly in sun if the design calls for shaded mounting. Reattach if loose.
- 4. Replace if damaged: Swap the sensor with a correct Goodman ambient thermistor if it appears damaged.
When to call a professional: If F2 persists, the outdoor control board may need diagnosis and replacement by an HVAC technician.
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Repair Difficulty
Medium
3/5
Required Part
Outdoor ambient temperature sensor
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