Carrier 330426-408 Arm Assembly

The Carrier 330426-408 Arm and Grommet Assembly is the OEM motor mounting arm with its rubber isolation grommet already fitted, supplied as one Carrier factory assembly. It belongs to the 330426 family of blower motor arms, a group that also includes the 330426-401, 330426-403, 330426-405, 330426-406, 330426-407, 330426-409 and 330426-411. Every dash number in that family is its own separate part, so the 330426-408 is the current Carrier assembly when the arm you are replacing is stamped 330426-408.

Why does a small bracket matter? A running blower motor is a vibrating mass, and the arm is what holds it at the correct position and shaft alignment to the blower wheel, while the grommet keeps that vibration from traveling into the sheet metal cabinet and ductwork. Over the years the rubber can go hard, brittle, flat or oil-soaked, and a bent arm or cracked bend lets the motor sag. The result is a hum, buzz, tick or rattle, often loudest at high speed, and in the worst case a wheel rub or extra load on the motor bearings.

Because the dash numbers in the 330426 family are not interchangeable by guesswork, identify the part the careful way. Read the number stamped on the old arm, compare it with the 330426-408, and confirm the model number and serial number on the equipment nameplate when the stamping is worn off. Before you condemn a noisy blower motor, check the arm and grommet first: a grommet that has flattened or a bracket that has cracked costs far less than a motor and produces the same complaint. To replace it, lock out the power, support the motor, note the arm orientation, install the 330426-408, snug the fasteners without crushing the rubber, spin the wheel by hand for clearance and run the unit to confirm smooth, quiet operation.

Key Benefits

• OEM Carrier assembly: The genuine Carrier part number 330426-408, supplied with the grommet already fitted as one piece.
• Quieter blower: A fresh isolation grommet stops motor vibration from reaching the cabinet and ductwork.
• Proper motor support: A straight, uncracked arm keeps the motor where Carrier intended and the shaft aligned to the wheel.
• Easy to verify: Match the stamped number on the old arm to 330426-408 before you order.

Common Questions

What is the Carrier 330426-408?
It is a Carrier ARM & GROMMET ASSY: a motor mounting arm with a rubber grommet installed, used to support a blower motor and isolate its vibration.

Can I use a different 330426 dash number in its place?
Treat each 330426 dash number as a separate part. Use the 330426-408 when the old arm is stamped 330426-408, and check the nameplate model and serial number if you are unsure.

Why does a blower get noisy when the grommet wears?
Worn rubber stops absorbing vibration, so the motor passes it into the cabinet as buzzing or rattling. A new arm and grommet assembly restores the cushion.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.