What is likely happening
Noise, vibration, or rapid on-off cycling usually means a bearing, belt, refrigerant, or control problem.
What you can safely check
- Note when the noise starts and stops.
What an inspector will look at
- Motors, belts and bearings
- Controls
- Refrigerant charge
Does this affect compliance?
Not a compliance item on its own.
Not sure what applies?
Talk to an advisor about what is going on. If a code or local rule covers it, we will tell you, and if it is a repair, we will say that too. To see the local rules for your building, open this in the interactive Problem Solver.
Request an inspectionTalk to an advisorGeneral guidance only, not a substitute for a licensed inspection or emergency services. For any gas odor, carbon monoxide alarm, fire, or trapped occupant, call 911 first.