Why Is My Furnace Making a Loud Noise?
The type of furnace noise often points to the problem. Here is how to read what you are hearing and when to shut it down.
Common Causes
- Banging or booming from delayed gas ignition, which can be a safety issue
- Squealing from a worn blower belt or motor bearings
- Rattling from loose panels, screws, or ductwork
- Grinding from failing blower motor bearings
- Whistling from a clogged filter or a duct leak
What You Can Check Yourself
- Replace a dirty filter, which causes many airflow noises
- Tighten any obvious loose panel screws
- Turn the furnace off and call us if you hear banging, grinding, or a metal on metal sound
When to Call Air Plus Heating
If the quick checks above do not solve it, the problem needs a trained technician. Air Plus Heating has served Utah County since 1982 with honest pricing, free estimates, and same day and 24/7 emergency service. Learn more about our furnace repair in Utah County, or see all of our HVAC troubleshooting guides.
Related Questions
Why Is My Furnace Making a Loud Noise?
Loud furnace noises point to different problems: banging can be delayed ignition or ducts, squealing often means a blower belt or motor, rattling can be a loose panel, and grinding usually means worn bearings. Turn the furnace off if the noise is loud or new, and have it inspected.
Is a loud banging furnace dangerous?
A loud boom on startup can mean gas is building up before it ignites, which is a safety concern. Turn it off and schedule service right away.
Why does my furnace make noise when it starts?
A small click or whoosh is normal. Loud banging, grinding, or squealing is not, and it should be checked before it causes more damage.
Need HVAC Help in Utah County?
Call (801) 362-5115 for same day and 24/7 emergency service, or request a free estimate.