F4
Blaupunkt
Discharge Temperature High / Sensor Error
Unit displays F4 and stops; often associated with compressor discharge temperature issues.
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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
Blocked condenser coil, Failed outdoor fan motor, Faulty discharge temperature sensor, Overcharged refrigerant
How to Fix / Troubleshooting
Safety first: Isolate power and allow the outdoor unit to cool before touching any components.
Steps:
- Clean condenser: As with E8, thoroughly clean the outdoor coil and ensure good airflow.
- Check outdoor fan: Confirm the fan starts reliably and runs at full speed. Replace the Blaupunkt outdoor fan motor if it is intermittent or seized.
- Inspect discharge sensor: Verify the sensor is tightly attached to the discharge line and wiring is intact. Test resistance and replace if faulty.
- Refrigerant check: Persistent F4 after airflow and sensor checks suggests a refrigerant charge issue; have a technician verify and correct the charge.
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Repair Difficulty
Hard
4/5
Required Part
Discharge Temperature Sensor / Outdoor Fan Motor
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