The blower wheel is the part of a furnace that distributes the heated air into your home. If the wheel breaks or malfunctions, you will have slight amounts or no hot air coming out of your vents. Make sure first that the issue isn't with the motor behind the fan.
If you have narrowed down the problem to the blower wheel, replacing the part first requires you to isolate the blower assembly from the furnace then remove the wheel from the assembly. Have questions or qualms about the project? Contact a furnace repair services company.
Things You Need:
- Digital camera
Step 1: Isolate the Blower Assembly
Turn off the power supply at the shut-off switch, breaker, or fuse box. Locate the lower panel on the rear of the furnace and twist the retaining knobs or nuts to loosen the panel. Pull the panel off the furnace and set aside out of your way.
Use a screwdriver to loosen the screws holding the humidifier wires in place. Pull the wires off the screws and allow the wires to dangle out of the way until needed again.
Take a picture of the thermostat wire orientation for easy installation later. Use the screwdriver to twist the screw holding each wire in place just until you can manually remove the wire. Let these wires dangle.
Find the bundle of control board wires bound together with a zip tie. Snip the zip tie with a pair of pliers.
Unscrew the mounting screws holding the blower assembly support brackets in place. Reach in and grab the bottom of the assembly. Slide forward the assembly working slowly until fully out of the furnace carefully, watching out for sharp edges and working slowly due to the weight of the assembly.
Step 2: Remove the Blower Wheel from Assembly
Turn the assembly onto its side so that the set screw for the blower wheel is facing up. Use a wrench to loosen the set screw. Flip the entire assembly over carefully. Use a socket to remove the screws securing the blower motor mounting bracket. Pull the motor and bracket free of the assembly.
Set the blower wheel upright so that the open sides of the wheel are at the sides. Remove the screws securing the housing to the support bracket. Bend the edge of the housing gently back to make more clearance space. Reach inside and grab the blower wheel and pull up and out. Dispose of the old blower wheel.
For more information, talk to a professional like R & B Inc Heating & Air Conditioning.