CodeRegistry
Brands
  1. Home
  2. Carrier
  3. Energy Recovery Ventilators
  4. T409 Fan Status Switch
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.

T409 Fan Status Switch

T409 — Fan Status Switch Fault

Carrier · Energy Recovery Ventilators

What does T409 Fan Status Switch mean?

The fan status switch is indicating an incorrect state. This can lead to a unit shutdown if configured.

Common Causes

  • Bad Fan Status Switch
  • Incorrect configuration settings
  • Tripped Circuit Breaker
  • Broken fan belt
  • Bad indoor fan motor

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check if the circuit breaker for the fan is tripped and reset if necessary.

  2. 2

    Inspect the fan belt for breakage or tension issues.

  3. 3

    Verify the indoor fan motor is functioning correctly.

  4. 4

    Check the fan status switch itself for proper operation and wiring.

  5. 5

    Ensure the configuration settings for the fan status switch are correct.

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