e3
Moderate
Daikin · Mini-Splits & Ductless Systems
High Pressure Fault
Quick Answer
Error code E3 on your Daikin Mini-Splits & Ductless Systems means: High Pressure Fault. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Clean the outdoor condenser coil with water and approved coil cleaner (spray from inside out)
2
Verify the outdoor fan motor is running and the blade spins freely
3
Check for obstructions around the outdoor unit and maintain at least 12 inches of clearance on all sides
4
Measure discharge pressure with gauges and compare to normal operating range
5
Only an EPA Section 608 certified HVAC technician should diagnose and correct refrigerant charge issues
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Outdoor fan motor
Coil cleaner
High-pressure switch
Fan blade
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