If you begin to hear scraping and clanking like metal clashing together, there may be an issue with your furnace’s blower wheel. To fix this, turn off your heater and contact an HVAC technician to inspect your heater.
Why does my heater make a loud noise when it turns on?
A loud rumbling sound coming from the furnace is usually due to an issue with the blower wheel. A faulty burner could be causing the noise, or the noise could also be caused by rapid expansion and contraction of the air ducts. The issue is common when the ducts are made of metal.
How do I stop my furnace from banging?
You should be replacing your heater’s filter at least once a season. In practice, this is going to look like a switch out in the fall and in the winter. Your air filter is what keeps your heater running on high. If it’s dirty, you might notice a change in the way that your home’s heater runs and hear some odd banging.
Is it normal for a furnace to make noise?
Banging and Popping Noises
Banging and popping sounds are normal. Often, furnaces make these sounds as the ducts expand and contract. However, if the banging and popping sounds are exceptionally loud and frequent, it could signal a problem with your furnace.
What does a bad furnace sound like?
Noise #4: Humming or buzzing
A dull hum is normal while your furnace is running. But if you hear a loud humming or buzzing sound coming from your furnace, it usually means your furnace has an electrical problem.
Why does my furnace sound like an airplane taking off?
If your furnace sounds like an airplane or jet engine taking off, it’s usually a gas issue. Gas could be leaking from a line or valve. Or, if you hear a click before the swooshing sound, you may have a broken heat exchanger that is leaking gas.
Can a furnace explode?
The modern gas furnace is much safer than electric space heaters, and furnaces are built to high safety standards. Although it is possible for a gas furnace to either catch fire or explode, it’s highly unlikely. If there is a danger of this happening, the furnace will usually simply shut off—as it’s designed to.
Why is my furnace making a knocking sound?
Knocking Sounds
An ongoing knocking sound can indicate many things, including worn bearings, a cracked belt, a malfunctioning gas valve, or dirty burners. These issues all require professional attention. The only knocking noise that’s not a cause for concern is one caused by the metal housing around vents and pipes.
Why does my furnace make a high pitched noise?
A high-pitched squealing or whistling noise in a furnace could indicate problems with the unit’s blower or the motor that powers it. The motor has bearings that can become worn out with age or with repeated overheating (build-up of dirt or problems with the capacitor can cause a unit to overheat).
What does a bad blower motor sound like?
A defective blower motor will make a continuous sound noticeable by the passengers in the vehicle. It can manifest as a knocking, whirring, clunking, vibrating, squealing, or whining noise that persists until the blower motor is replaced.
