A4 — Exhaust outlet at the flow guard

What does A4 mean?

An issue has been detected with the exhaust outlet by the flow guard system. This typically indicates a problem with flue gas discharge, such as a blockage or poor flow.

• The exhaust path is blocked or restricted.
• Issues with the flue gas fan or its operation.
• Malfunction of the flow guard sensor itself.

Click steps to track your progress.

1. 1

   Check the entire exhaust path for any obstructions, debris, or blockages.

2. 2

   Ensure that the flue gas system is clear and that air can flow freely.

3. 3

   If no visible blockages are found, professional inspection of the flue system and fan is recommended.