Tag: error-code

All the articles with the tag "error-code".

• Trane XV20i Error Code 79: Communicating Thermostat Fault Fix

  26 Apr, 2026

  Trane XV20i error code 79 means a communicating thermostat fault. Learn the causes, how to diagnose ComfortLink II wiring issues, and how to fix it fast.

• Carrier Furnace Error Code 13 — Limit Circuit Lockout Fix

  26 Apr, 2026

  Carrier error code 13 means limit circuit lockout after repeated high-limit trips. It auto-resets after 3 hours. Here's what caused it and how to fix it.

• Carrier Furnace Error Code 31 — Pressure Switch Open Fix

  26 Apr, 2026

  Carrier Furnace Error Code 31 - Pressure Switch Open Fix: likely causes, checks, and repair decisions before replacing parts.

• Carrier Code 33 Limit or Rollout Fault

  26 Apr, 2026

  Carrier code 33 guide for limit-switch and rollout faults, airflow, filters, blower speed, gas pressure, heat exchangers, and resets.