H3
Sencor
Compressor Overload Protection
Display shows H3 and unit shuts down, often in high load conditions.
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
Blocked condenser airflow, Dirty condenser coil, Failed outdoor fan motor, Overcharged or undercharged refrigerant, High ambient temperature
How to Fix / Troubleshooting
Safety first: Turn off power before cleaning or opening the outdoor unit.
- Step 1 – Check airflow: Ensure at least 30 cm clearance around the outdoor unit. Remove any obstructions.
- Step 2 – Clean condenser coil: Gently brush or hose (if allowed by Sencor manual) the outdoor coil fins from inside out to remove dirt. Do not use high pressure directly on fins.
- Step 3 – Verify outdoor fan: Confirm the outdoor fan starts and runs at full speed when cooling or heating. Replace the fan motor if it is slow or not running.
- Step 4 – Allow cool-down: After an H3 event, let the unit cool for 30 minutes before restarting.
- Step 5 – Professional refrigerant check: If H3 recurs, a technician should measure operating pressures and correct any refrigerant charge issues.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Condenser Coil
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements