Blower Wheels
OEM and universal replacement parts for all major HVAC brands. Same-day shipping on orders before 3 PM CST.
How to Choose the Right Blower Wheel
The blower wheel (squirrel cage fan) is the component inside your furnace or air handler that moves air through the ductwork. When it fails or gets dirty, you'll notice weak airflow from all vents, scraping or rattling noises, or vibration in the cabinet. A dirty blower wheel is one of the most overlooked causes of poor HVAC performance.
Measuring for Replacement
You need three measurements: diameter (across the widest point), width (depth of the wheel), and bore size (center hole for the motor shaft — typically 1/2" or 5/8"). Also note rotation direction — CW or CCW viewed from the open end. The safest method is matching by equipment model number.
Cleaning vs Replacing
Heavy dirt buildup is the #1 blower wheel problem — cleaning often restores full airflow without replacement. Remove the wheel, soak in warm soapy water, scrub each blade individually. Replace only if blades are cracked, broken, or the hub is loose on the shaft. Annual cleaning prevents most blower wheel failures.
Related Parts
Blower problems often involve the motor, not just the wheel. Check blower motors if the wheel spins freely but the motor won't start. Check fan relay/control boards if the motor has power but won't engage. Use our diagnostic tool to narrow it down.
Frequently Asked Questions
How do I know if my blower wheel is bad?
Scraping or rattling noise from the air handler is the most common sign — the wheel has shifted on the motor shaft or a blade is broken. Reduced airflow from vents despite the motor running suggests dirt buildup. Vibration shaking the cabinet means the wheel is out of balance.
Can I clean a blower wheel instead of replacing it?
Yes — remove, soak in warm soapy water, scrub each blade. Replace only if blades are cracked, broken, or the hub is loose. Clean annually for best performance.
How do I measure my blower wheel for a replacement?
Measure diameter, width, bore size, and note rotation direction (CW or CCW from the open end). The easiest method is to use your furnace model number above to find the exact OEM wheel.
Why is my blower wheel making a scraping noise?
The wheel has likely slipped on the motor shaft and is rubbing the housing. Tighten the set screw on the hub (3/8" or 5/16" hex). If still scraping with a tight set screw, the motor bearings may be worn — replace the blower motor rather than the wheel.
Is replacing a blower wheel a DIY job?
Yes — moderate DIY, 45-90 minutes. Remove the blower assembly (2-4 screws), disconnect motor wiring, loosen the set screw, slide off old wheel, reverse with new one. Penetrating oil helps with corroded set screws.