E231
Samsung
4-Way Reversing Valve Coil Error
Indoor unit shows E231; unit may not cool or heat.
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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
Open or shorted reversing valve coil, Loose coil connector, Faulty outdoor PCB output to valve, Mechanical sticking of reversing valve
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before accessing the outdoor unit. The reversing valve is part of the sealed refrigerant system; do not attempt to open it.
- Step 1 – Locate coil: In the outdoor unit, find the 4-way reversing valve (a brass body with several copper pipes) and its electrical coil.
- Step 2 – Check connector: Ensure the coil's electrical connector is firmly attached and free of corrosion.
- Step 3 – Listen for switching: With power restored and mode changed from COOL to HEAT (or vice versa), listen for a distinct click from the valve. Lack of sound may indicate coil or valve issues.
- Step 4 – Technician tasks: Testing coil resistance and replacing the coil or valve requires HVAC tools and refrigerant handling certification. Contact a professional if E231 persists.
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Repair Difficulty
Professional Required
5/5
Required Part
Reversing Valve Coil
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