Carrier 330426-405 Arm Assembly

The Carrier 330426-405 Arm and Grommet Assembly is the OEM motor mounting arm with its tan rubber grommet already fitted. The arm is a zinc-colored metal bracket formed with a right-angle bend, and the grommet sits in the arm ready to receive the motor mount, so the whole thing goes in as one Carrier factory assembly. It sits in the 330426 arm family, next to the 330426-401, 330426-403, 330426-406, 330426-407, 330426-409 and 330426-411.

What sets the 330426-405 apart is that right-angle arm with the tan grommet. Its 330426-407 neighbor is a shallow-bend arm with a black grommet, and the family is not a single design with different labels; each dash number is a separate arm and grommet built for particular equipment. Match the part by the number stamped on the old arm and by the model number and serial number on the unit nameplate, and when the old arm is marked 330426-405, this is the current Carrier replacement.

As for how it works, the blower motor is a vibrating mass that has to be held in exact position and alignment to the blower wheel. The arm provides that rigid support, and the grommet is the isolator between the motor and the metal, which keeps vibration and noise out of the cabinet. When the rubber hardens, cracks, flattens or gets soaked in oil, the motor drops slightly and starts to buzz, tick or rattle, and a bent arm lets the shaft drift, which wears the motor bearings and can make the wheel rub. Inspect the arm and grommet before you replace a motor. To install, disconnect power, support the motor, mark the arm orientation, fit the 330426-405, tighten the hardware without crushing the grommet, spin the wheel by hand and then check for quiet, smooth running.

Key Benefits

• Right-angle arm, tan grommet: The 330426-405 is a specific Carrier arm style, easy to compare against the part in your unit.
• Factory assembly: The grommet arrives seated in the arm exactly as Carrier supplies it.
• Vibration isolation: New rubber cushions the motor and keeps blower noise out of the cabinet and ducts.
• Keeps the motor square: A sound arm maintains shaft alignment to the blower wheel, which protects the bearings.

Common Questions

What does the Carrier 330426-405 look like?
It is a right-angle plated metal arm with a tan rubber grommet. Compare it to the arm in your unit and to the number stamped on the old part.

Is the 330426-405 the same as the 330426-407?
No. The 330426-407 is a shallow-bend arm with a black grommet. They are separate Carrier part numbers, so match the number stamped on your old arm.

Do I need to replace the grommet and arm together?
Yes. The 330426-405 is sold as a complete arm and grommet assembly, and aged rubber is the usual reason these parts are changed.

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.