E454
Samsung
Outdoor Unit Overcurrent / Inverter Protection
E454 appears; unit may not start compressor.
Advertisements
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.
Advertisements
Possible Causes
Shorted compressor, Shorted inverter IGBT module, Blocked condenser coil causing high current, Faulty current sensor on PCB
How to Fix / Troubleshooting
Danger: Overcurrent faults can indicate serious electrical problems. Do not repeatedly reset the breaker.
- Step 1 – Inspect outdoor unit: With power OFF, check for obvious damage, burnt smells, or melted components.
- Step 2 – Clean condenser coil and ensure airflow: Remove debris and clean fins as described for E104.
- Step 3 – Restart once: After cleaning and inspection, restore power and attempt to run the unit. If E454 reappears quickly, stop using the system.
- Technician required: Testing compressor and inverter components is a high-risk task and must be performed by a qualified HVAC technician.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Inverter PCB
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements