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15021

15021 — Space temperature thermistor fault

Carrier · 30XA/XAS/XB/XBP/XW Chillers

What does 15021 mean?

The thermistor monitoring the space temperature has a fault. No specific action is taken, but system performance might be affected.

Common Causes

  • Defective space temperature thermistor
  • Wiring or connection issue

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the wiring to the space temperature thermistor.

  2. 2

    Check the thermistor for any signs of damage.

  3. 3

    Contact Carrier Service if you suspect performance issues.

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
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