CodeRegistry
Brands
  1. Home
  2. Carrier
  3. 30XA/XAS/XB/XBP/XW Chillers
  4. 15003
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

15003

15003 — Defrost thermistor fault, circuit A

Carrier · 30XA/XAS/XB/XBP/XW Chillers

What does 15003 mean?

The sensor monitoring the temperature for defrost on circuit A has failed. The unit may display an alert or shut down.

Common Causes

  • Defective thermistor
  • Wiring issue with the defrost thermistor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the wiring connecting to the defrost thermistor for circuit A.

  2. 2

    Ensure the thermistor itself is not damaged.

  3. 3

    Contact Carrier Service for assistance if the fault remains.

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

Related Faults

1007810078 — High discharge gas temperature, circuit A1007910079 — High discharge gas temperature, circuit B1008010080 — High discharge gas temperature, circuit C
Source: Carrier 30XA/XAS/XB/XBP/XW Chillers
Open Manual (Page 37)Search more codes in this manual