HVAC Making Strange Noises? What It Means
Banging, squealing, or rattling from your AC or furnace? Learn what different sounds mean.
📋 Normal PriorityTypical cost: $100 - $400 diagnosis + repair
Common Causes
- 1Banging: Loose or broken part
- 2Squealing: Belt or motor bearing issue
- 3Rattling: Loose screws or debris
- 4Clicking: Electrical issue or failing relay
- 5Humming: Motor or capacitor problem
- 6Buzzing: Electrical arc or loose wiring
DIY vs Hire a Pro
🔧
DIY Friendly
Tighten visible screws, clear debris from around the unit, and replace the filter.
👷
Call a Pro
Call HVAC tech for persistent or loud noises, especially banging, squealing, or buzzing sounds.
Cost in San Diego
$100 - $400
diagnosis + repair
Costs vary based on complexity, materials, and urgency. Get multiple quotes for accurate pricing.
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