If the loud noise happens only when the furnace starts to turn on then this problem is called delayed ignition.
Trane furnace exhaust fan noise.
The induced or forced draft motor you have either of the two and the blower inside the gas furnace that blows the air through the ductwork.
In this episode of repair and replace vance shows you audio examples and solutions to the most common causes of a noisy furnace.
Train noise coming out of furnace.
This is caused by the fan bearings being worn out.
This can be caused by a loose or broken motor mount a loose or broken blower wheel or loose pulleys that are touching the motor housing or squirrel cage housing.
Also if there is a drive belt it needs to be tight and firmly seated in the grooves of the drive wheels.
When the exhaust fan first kicks in it makes a rattling noise.
So to be fixed the bearings will need to be replaced.
Part of an interactive video.
The sound the burners make when burning the gas.
More audible in the duct than next to the furnace.
When the power vent is noisy there are a few things that could cause this.
Not only are furnace exhaust fan noises disruptive they may also indicate potential problems within your furnace that need to be repaired immediately.
Fans spin at high rates of speed and need to turn smoothly.
Make sure all parts are tight.
Scraping the sound of metal rubbing on metal.
Step 1 clean the dirt on the fan.
If the fan spins and makes a squeaking noise use some light sewing machine oil to lubricate the blade shaft.
Once the burner lights and things warm up the noise stops.
Make sure that your furnace filter is clean and isn t restricting airflow by being dirty.
A furnace exhaust fan in need of repair is of particular concern since it is such a critical component of your system.
When the thermostat first signals for heat the first thing to happen is the exhaust blower turns on then the burner lights then the main blower starts.
Make sure you order the correct one.
Since the fan is moving quickly and quite frequently there tends to be a lot of buildup of dirt and dust.
If you hear your furnace making noise it could be a problem with the fan that cools down the furnace.
Inspect all of these.
Do not lubricate the drive wheel or its belt groove.
If the furnace is too loud.