Ductwork Troubleshooting
Ductwork Rattling?
Bang or rattle from ducts when AC runs? Several easy causes. CAC1819196.
Quick Answer
Duct rattling = (1) loose mounting straps (Tampa attic sagging, $79 fix per section), (2) thermal expansion pops (normal brief noise), (3) debris inside duct (rare, cleaning $180 Elite), (4) high static pressure pushing duct walls (airflow issue). Call (813) 343-2212.
Rattling Causes
Loose Mounting Straps
Symptom: Ducts sagging + hitting attic framing.
Re-secure straps $79+.
Thermal Expansion
Symptom: Metal ducts pop briefly when heating/cooling.
Normal. Severe: expansion joints.
Debris in Duct
Symptom: Construction leftovers, rodents, etc.
Elite duct cleaning $180.
High Static Pressure
Symptom: Too much airflow squeezing through small ducts.
Duct enlargement or blower adjustment.
What to Do Right Now
- Note when rattle happens (startup, run, shutdown).
- Listen for bangs from specific section.
- Call for FREE inspection.
Strap re-secure: $79+. Duct clean: $180. Airflow balancing: $279+.
FAQ
Normal or problem?
Occasional brief pops at startup: normal. Continuous rattle: problem. Diagnose.
Can I fix myself?
Attic work in Tampa heat is risky. Pros do it quickly.
Rats in ducts?
Possible in older homes. Cleaning + duct sealing + pest control combo.