Frigidaire
Return Air Restriction / High Static Pressure
Furnace is very loud at the return grille, with strong suction and noise
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Possible Causes
Undersized return duct, Blocked return grille, Filter too restrictive, Closed doors limiting return path
How to Fix / Troubleshooting
Safety: Ensure return grilles are not blocked by flammable materials.
- 1. Filter: Replace with a less restrictive filter if using a very high MERV rating.
- 2. Open returns: Fully open and clear all return grilles.
- 3. Door undercuts: Keep interior doors slightly open or ensure adequate undercut for airflow.
- 4. Professional duct evaluation: Have a technician measure static pressure and recommend return duct modifications if needed.
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Repair Difficulty
Easy
2/5
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