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J3-00

J3-00 — OU: Malfunction of discharge pipe thermistor

Daikin · ASHP Error Codes

What does J3-00 mean?

The thermistor (temperature sensor) on the discharge pipe of the outdoor unit (OU) is malfunctioning.

Common Causes

  • Faulty thermistor
  • Wiring issue
  • Improper sensor contact

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the wiring connected to the discharge pipe thermistor.

  2. 2

    Ensure the thermistor is securely attached to the pipe.

  3. 3

    Restart the unit.

  4. 4

    A service technician should diagnose the thermistor.

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

Related Faults

7H-017H-01 — Water flow problem7H-047H-04 — Water flow problem during domestic hot water production7H-057H-05 — Water flow problem during heating/sampling
Source: Daikin ASHP Error Codes
Open Manual (Page 3)Search more codes in this manual