Fix a problem
What is happening?
Start with the condition you can see—not a database category. Pick the closest problem, then narrow it down.
Won’t fit or line upWrong size, twisted flange, bad elevation, wrong hand, poor alignment.Route is blockedStructure, another trade, access space, ceiling, equipment clearance.Wrong size or orientationFitting hand, airflow arrow, branch direction, reducer, equipment opening.Damaged materialBent flange, torn liner, crushed flex, punctured jacket, wet equipment.Leak or failed sealOpen corner, seam leak, missing gasket, bad mastic, pressure-test failure.Airflow, noise, or vibrationLow air, whistle, rattle, vibration, restriction, closed damper.Support or hanger problemSag, loose rod, bad attachment, wrong spacing, load-path concern.Access will be blockedDamper, panel, filter, actuator, access door, service clearance.Print and field do not matchLocation, elevation, size, detail, coordination, missing information.Inspection or startup issueFailed walk, missing label, dirty system, closed damper, incomplete work.Missing tool, part, or materialCorrect fastener, sealant, fitting, hardware, access item, replacement.I made a mistakeStop, control the condition, and report exactly what happened.
Field-reviewed guides