Goodman Excessive Air Velocity / Duct Restriction

Goodman air conditioner indoor unit is very noisy with air rushing or whistling sounds

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Undersized supply or return ducts, Closed or undersized return grille, High blower speed setting on Goodman air handler, Filter with too high resistance

How to Fix / Troubleshooting

Safety first: Turn off power before adjusting blower speed taps or ECM settings.

Steps to reduce noise:

  • 1. Open all vents: Ensure all supply and return registers are fully open to reduce static pressure.
  • 2. Use appropriate filters: Replace very restrictive filters with medium-MERV filters recommended by Goodman for your system.
  • 3. Check for blocked returns: Make sure furniture or doors are not blocking return grilles.
  • 4. Blower speed adjustment: On some Goodman units, blower speed can be reduced by moving a speed tap or changing ECM settings. This should be done by a technician to avoid coil icing or reduced capacity.

When to call a professional: Persistent noise may indicate duct redesign is needed; an HVAC contractor can measure static pressure and recommend changes.

Advertisements

Repair Difficulty

Medium 3/5

Required Part

Indoor blower speed tap or ECM programming
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements