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HC-00

HC-00 — Tank temperature sensor problem

Daikin · ASHP Error Codes

What does HC-00 mean?

This error code indicates a problem with the sensor measuring the hot water tank temperature.

Common Causes

  • Faulty tank temperature sensor
  • Loose sensor wiring
  • Sensor disconnected

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the wiring connected to the hot water tank temperature sensor.

  2. 2

    Ensure the sensor is correctly installed and submerged.

  3. 3

    Power cycle the unit.

  4. 4

    A technician should verify the sensor's readings.

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