Most likely the blower fan has become loose and is creating the sound by hitting against the blower house casing. A metal-scraping sound needs to be addressed right away, and requires the attention of a professional HVAC technician.
Why is my furnace blower so loud when running?
A majority of furnaces will produce a low humming noise while they are operating. If this noise is becoming noticeably loud, this is a signal of a severe problem with your blower fan or capacitor. To prevent damage to your fan, it's important to call a licensed technician to inspect and repair the blower motor.
Why is my furnace louder than normal?
The simplest explanation for screeching or whistling is that your furnace air filter could be clogged with dust, hair, and dirt. That eerie screech you hear might just be air desperately trying to get through. Fortunately, you can take care of this noise issue yourself, quickly and inexpensively.
Why does my furnace sound like a jet engine?
Furnace Sounds Like a Jet Engine 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.
Why is my furnace making noise when blowing air?
Furnace air flow usually increases with temperature increase. Check the furnace filter and ductwork for any restriction that could be blocking proper airflow. If your blower is running at high speed, it can cause the motor to generate audible noise. A dirty Motor or blower Assembly can cause the motor to run hot and be noisy.
How do you fix a noisy furnace blower motor?
Secure the foam with metal wire to make sure the foam doesn’t get sucked into the blower. Add Bolts – It helps to add modifications to the furnace blower motor itself to keep it quiet. Adding rubber mounts to the feet of the motor can help absorb some of the rattle and sound.
Why is my new blower motor making noise?
If you’re facing the problem of a new blower motor making noise, it can be due to the following: Bad bearings: There’s a chance the bearings or any of the parts surrounding the blower motor are worn out or loose. Bearings tend to wear out since they are constantly in motion.
Why does my furnace squeal when I turn it on?
When you hear a high pitched squeal, or whining sound coming from your furnace the issue could very well be the bearings on your blower motor. Bearings should generally last a long time on blower motors.
Below you will find two interesting articles on a similar topic 👇
Can you run furnace without blower?What causes a furnace motor to burn out?
