How do I tell CW vs CCW rotation -- and does it matter for my motor?

Look at the front of the blade. Watch which way it turns when the system is running. CW = clockwise as you face the blade; CCW = counter-clockwise. The arrow stamp on the blade hub also marks rotation. If your motor is reversible (most modern condenser fan motors are), you can use either CW or CCW blade and just wire the motor to match. Non-reversible motors require matching the blade to the motor's fixed direction. Check the motor's data plate or terminal cover for a wiring diagram showing reversible operation.

How do I install a fan blade?

1. Slide the blade onto the motor shaft, aligning the hub set-screw with the FLAT spot on the shaft. 2. Position the blade so the leading edge is 1/2"-3/4" inside the venturi (the round opening in the condenser top). 3. Tighten the set-screw on the flat spot. Apply blue thread-locker if available. 4. Spin by hand -- should turn freely with no wobble. 5. Power up briefly to verify rotation direction matches the arrow.

What's a hubless blade?

A hubless blade has the motor shaft pass through a center mounting hole with set-screws directly on the blade hub. A hubbed blade has a separate metal hub that bolts to the blade and holds the set-screws. Hubless = simpler, fewer parts; hubbed = stronger, more common on heavier-duty applications.

Why is my new blade vibrating?

Out-of-balance blade or bent hub. Stop the system immediately -- vibration will destroy the motor bearings. Check for: bent blade tip (impact damage), missing balance clip, loose hub, or wrong blade for the motor. Bring it back; we'll match a balanced replacement.

Low Stock

Universal

FAN04073 – FAN BLADE (3, 28″, 18°, CCW, HUB ON INTAKE)

Name: FAN04073 - FAN BLADE (3, 28", 18°, CCW, HUB ON INTAKE)
Brand: Universal
SKU: FAN04073
Price: 192.63 USD
Availability: InStoreOnly

SKU FAN04073·Replaces FAN04073

$192.63

In-store price · paid at counter

Low Stock at our Dallas counter

Tested before you leave. Free at the counter.

In-Store Only — We Don’t Ship

Every part is sold in person at our Dallas counter. No shipping, no online orders. Solo venta en tienda — no hacemos envíos.

Visit our Dallas counter to purchase

10226 Plano Rd, Suite 104 · Dallas TX 75238

Call (214) 340-9421 Get directions

Open now · Closes 7pm·Mon–Fri 10am–7pm · Sat 10am–3pm

Free part testingBench-tested at the counter

27,000+ in stockToday, on the shelf

4.9 · 546 reviewson Google

Since 199828 years on Plano Rd

Pro tip

Match diameter, blade count, and hub style to your existing blade. **Pitch (degrees) is forgiving -- within about 3 degrees is fine** (a 27-degree blade works in place of a 25 or 30 degree blade). **Rotation depends on your motor:** most modern residential condenser fan motors are reversible (look for a jumper or rewireable lead diagram on the motor) -- if yours is reversible, you can use either CW or CCW blade and just wire the motor to match. If your motor is non-reversible, the blade rotation has to match the motor's fixed direction. Diameter is NOT forgiving -- bigger diameter risks hitting the condenser cabinet; smaller diameter creates an air gap that kills capacity. Bring the old blade and your motor's data plate; we'll match at the counter. Tighten the hub set-screws to the FLAT spot on the motor shaft (most condenser shafts have one); never tighten on the round part -- it'll spin loose in days.

Free Part Testing

27,000+ In Stock

4.9 Stars · 546+ Reviews

Since 1998

🏪 In-Store Pickup Only — We do not offer shipping or online ordering. Visit our Dallas location to purchase.

In Stock

Visit our Dallas store to purchase

Call (214) 340-9421 Get Directions

In Stock — Pick Up at Our Dallas Store

10226 Plano Rd, Suite 104, Dallas TX 75238

Questions? Call or text (214) 340-9421

Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm

Symptoms of failure

Visible crack, bend or missing chunk on a blade
Outdoor unit vibrates or wobbles when running
Blade rubs or ticks against the grille
Airflow off the top of the condenser is weak
Blade came loose on the shaft
Hail or a storm bent the blade

Seeing these does not always mean this part is the culprit. Bring the old one in and we will meter it at the counter, free, before you buy.

Replacement condenser fan blade for Trane and American Standard outdoor units. If the original blade is cracked, bent, or missing pieces, replacing it restores proper airflow across the condenser coil. Match the diameter, blade count, pitch, and rotation direction to your original blade.

Specs: 28″ (27.6″) diameter, 3 blades, 18° pitch, counterclockwise (CCW), hub on intake side

Replaces: FAN04073, FAN04074

Fits: Trane and American Standard condenser units using FAN04073/FAN04074 fan blades

Need help? See our AC Fan Not Spinning Guide.

In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.

Specs

TypeCondenser fan blade
Blade Count3 blades
Diameter28"
Pitch18°
RotationCCW (counter-clockwise from shaft end)
Hub StyleHub on intake side
OEM CompatibilityUniversal
Bore1/2"

Installing it yourself

Difficulty 2/5Typical time 25-40 minutes

Kill power at the disconnect and confirm 0V.
Note the exact blade HEIGHT on the shaft before removal - depth in the shroud sets the airflow.
Loosen the set screw. The retaining nut is often reverse-threaded.
Match diameter, blade count, pitch, rotation and bore. Rotation is read from the shaft end - CW and CCW blades are not interchangeable.
Hubless blades need a hub sized to your motor shaft. Hubbed blades are 1/2" bore.
Set the new blade to the same height, tighten the set screw onto the flat of the shaft.
Spin it by hand to check clearance before you restore power.
A wrong-rotation blade will move air the wrong way and cook the compressor - if you are unsure, bring the old one in.

Power off at the disconnect first, every time. Not sure partway through? Bring it to the counter and we will walk it with you.

$192.63

Low Stock · Dallas counter

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