Static field route #1047

TAB found zero airflow or no air at a diffuser

Airflow/TAB Impacts From InstallationV136 field-polished

Trace the diffuser backward before blaming the unit. Zero airflow usually starts with a closed damper, disconnected branch/flex, blocked boot, wrong device, or sealed/covered opening.

Open in Field Rescue Open category

Field checklist

Confirm the room/device tag.
Check diffuser/boot connection.
Trace flex/branch back to damper/main/VAV.
Check damper position and access.
Report the first restriction/mismatch before changing controls/equipment.

Ask foreman

TAB is getting zero/no air at [device]. Can I trace the branch back and verify boot, flex, damper, and VAV/main connection before we blame the unit?

Do not

Do not randomly open/reset unknown dampers or blame the unit without tracing the branch.

Why it matters

This route was added from apprentice scenario testing to catch natural field/search language before it becomes a dead end. Verify job-specific authority before acting.

Search words: TAB zero airflow no air diffuser dead diffuser no cfm closed damper branch disconnected TAB zero airflow no air diffuser dead diffuser no cfm closed damper branch disconnected