Introduction
In a gas furnace, the draft inducer is responsible for expelling combustion gas out of the furnace and venting it to the outside. It’s one of the most important components in a furnace, and it’s the first thing that turns on when a heating cycle begins. It also stays running during a heating cycle to provide a steady and even flow of oxygen to the burners.
When a draft inducer motor stops working, the entire gas furnace will cease operation, so it’s important that you replace it as soon as possible. A loud whining noise is characteristic of a failing draft inducer motor, as the bearings inside are wearing out.
This replacement guide uses a Carrier WeatherMaker 8000TS furnace from 1999. The draft inducer motor and assembly may differ on your specific furnace model.
What you need
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Start by turning off the flow of gas to your furnace, as well as cutting power to the whole furnace by flipping the service switch to the "Off" position.
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Grab the handle on the front panel marked "Lift" and push up to release the panel. Place it off to the side.
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Use a flathead screwdriver or a 1/4-inch socket to remove the two screws holding the shield plate to the draft inducer assembly.
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Remove the plate and set it off to the side.
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Use a 1/4-inch socket to remove the three mounting bolts securing the draft inducer assembly to the furnace.
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Support the motor and assembly from the bottom and slowly remove it from the furnace.
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Use a flathead screwdriver or a small pry tool to carefully pry off the circular clip from the cooling fan.
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Flip the assembly over and use a 1/8-inch hex key to loosen the set screw securing the blower fan to the motor's driveshaft.
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Remove the blower fan from the motor's driveshaft.
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As with the cooling fan, you may need to apply a decent amount of pressure and wiggle the blower fan in order to remove it.
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Flip over the assembly and use a 1/4-inch socket to remove the three bolts securing the motor bracket to the motor plate.
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Once the bolts are removed, flip the assembly back over and remove the motor bracket.
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Use a 1/4-inch socket to remove the two bolts securing the motor to the motor plate.
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Remove the motor bracket.
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To reassemble your device, follow these instructions in reverse order.
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3 Guide Comments
Thanks for the instructions, very helpful.
Do you know the Inducer motor part number?
Good morning, I need the whole unit ( motor, fan, blower fan, ) etc. This looks like same same unit I have but I can't find a model number for this to make sure I purchase the right one for my unit. I have a carrier weathermaker 8000vs looks exactly like the one here can someone please provide some helpful information thanks.
