Noises & Vibrations

Furnace squealing noise is often caused by blower belts, bearings, or motor problems. Here’s how to identify the source and what to do next.

Loud vibrations or shaking noises from your HVAC system often signal loose parts, blower problems, refrigerant issues, or failing motors. This guide explains what each noise means, how to fix it, and when to call a professional.

A rumbling noise after your furnace shuts off often signals burner or draft issues. Here’s how to diagnose and fix it safely.

A loud boom when your furnace starts is often caused by delayed ignition or duct expansion. Here’s how to diagnose it and when it becomes a safety concern.

Metal‑on‑metal scraping is a serious HVAC warning sign. Here are the most common causes and what to do next.

High‑pitched whistling happens when air is forced through a restriction. Here’s how to diagnose and fix whistling HVAC noises.

Buzzing or humming noises often come from electrical components, motors, or refrigerant issues. Here’s how to diagnose and fix them.

Rattling or vibrating HVAC equipment often means loose panels, debris, or failing motors. Here’s how to diagnose and fix it.

Banging or knocking sounds often come from duct expansion, ignition delays, or loose parts. Here’s how to diagnose and fix them.