F5
Bosch
Condenser Overheat / Sensor Correlation Fault
F5 is displayed and the unit may not operate in certain modes or may shut down.
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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
Incorrect readings from condenser and ambient sensors, Poor outdoor airflow, Faulty condenser sensor, Outdoor PCB misinterpreting sensor data
How to Fix / Troubleshooting
Safety first: Turn off power before cleaning or opening the outdoor unit.
Steps:
- Clean outdoor coil and fan: Remove debris and ensure the fan spins freely. Poor airflow can cause real overheat conditions.
- Check sensors: Verify both condenser and ambient sensors are correctly mounted and their cables are intact.
- Power reset: After cleaning and inspection, perform a full power reset (off for 10–15 minutes) to clear temporary faults.
If F5 persists: A Bosch technician should check sensor resistance values and replace the faulty sensor or outdoor PCB as needed.
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Repair Difficulty
Hard
4/5
Required Part
Outdoor Condenser Temperature Sensor
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