Skip to main contentStart diagnosing E3 on your Daikin air conditioner
Daikin Air Conditioner Error Code E3
E3Daikin Air Conditioner
What this code means
Actuation of high pressure switch - high pressure switch activation count reaches operation-mode-specific number.
First step from the service manual
Check if stop valve is open, high pressure switch connector is properly connected, and switch has continuity.
Next steps: diagnose the root cause
1
Verify the error code is active
Power cycle the unit and see if the code returns. If it does, the fault is persistent and requires diagnosis.
2
Get the full diagnostic procedure
Get step-by-step guidance, test values, and wiring diagrams from the OEM service manual.
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What’s available for Daikin air conditioner models
Access Daikin air conditioner service manuals, wiring schematics, exploded parts views, and error code references on MyPros+.