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D16 Green LED

D16 Green LED lit — ERV Dirty Filter Alarm

Carrier · Energy Recovery Ventilators

What does D16 Green LED mean?

This light means the system has detected a dirty filter. This can affect the unit's performance.

Common Causes

  • Air filter is dirty or clogged

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check and clean or replace the air filter.

  2. 2

    Ensure the filter is correctly installed.

  3. 3

    Reset the alarm after changing the filter.

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 67)Search more codes in this manual