CodeRegistry
Brands
  1. Home
  2. Carrier
  3. Energy Recovery Ventilators
  4. T408
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.

T408

T408 — Dirty Air Filter

Carrier · Energy Recovery Ventilators

What does T408 mean?

An alert has been generated because the air filter is dirty.

Common Causes

  • Air filter is dirty

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Locate and inspect the air filter.

  2. 2

    Clean or replace the air filter as needed.

  3. 3

    Reset the alert in the system controls.

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

Related Faults

1 Fault CodeFault Code 1 — OVERCURRENT10 Fault CodeFault Code 10 — PANEL LOSS11 Fault Code11 Fault Code — ID RUN FAIL
Source: Carrier Energy Recovery Ventilators
Open Manual (Page 47)Search more codes in this manual