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6-3

6-3 - Contaminated sensor error (Heat reclaim ventilator)

Daikin · Simple Self Diagnosis by Malfunction Code | Daikin

What does 6-3 mean?

A sensor within the heat reclaim ventilator is reporting an error, possibly due to contamination.

Common Causes

  • Dirty sensor
  • Sensor malfunction
  • Wiring problem

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the unit's power.

  2. 2

    Clean any accessible sensors according to the manual's instructions.

  3. 3

    Restore power and check the display.

  4. 4

    If the error continues, a technician is needed.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

6-06-0 - External protection device activated (Heat reclaim ventilator)6-16-1 - Malfunction of PCB (Heat reclaim ventilator)6-26-2 - Ozone density abnormal (Heat reclaim ventilator)
Source: Simple Self Diagnosis by Malfunction Code | Daikin
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