Carrier P251-0079 Grommet
The Carrier P251-0079 Rubber Grommet is a molded rubber motor-mount grommet used in Carrier motor mounting brackets. It is the vibration-isolating cushion that sits in the bracket where the motor is held, so the motor's vibration and hum are not passed into the cabinet. The P251-0079 is a small stepped grommet with a center hole through the middle: a narrow upper collar sits on a wider shoulder, with a groove between them. The factory photo shows a tan-brown rubber grommet beside a ruler for scale.
A grommet like the P251-0079 is a wear item. Heat cycling, age and oil or dirt make the rubber go hard, crack or flatten, and a worn grommet lets the motor sag, rattle or tick against the bracket. A common failure sign is a new noise that follows blower speed, or a motor that has shifted out of alignment with the blower wheel. Parts catalogs list the P251-0079 as the grommet for a motor mounting bracket, and three grommets are used to hold a motor, so it is good practice to replace all three together while the motor is out. It is stocked here as a single grommet, so order a quantity of three for a complete set.
The P251-0079 belongs to the same Carrier P251 family of motor mounting hardware as the P251-0073 mount, P251-0074 mounting pack, P251-0077 mounting arm and P251-0078 motor mounting band. Those numbers are separate parts, so use the P251-0079 when the rubber grommet is what is worn and the bracket itself is sound. When you replace it, support the motor so it is not hanging on the other grommets, seat each grommet fully in its bracket hole, and check that the motor is square to the blower wheel before you tighten the mounting hardware. Spin the blower wheel by hand to confirm it does not rub.
Key Benefits
- Carrier OEM grommet: The factory P251-0079, made for Carrier motor mounting brackets, not a generic rubber bushing that may be the wrong thickness or hole size.
- Vibration isolation: Cushions the motor in the bracket so vibration, hum and rattle are not transmitted into the cabinet.
- Sold per grommet: Three grommets are used per motor, so you can order a full set by selecting a quantity of three.
- Family clarity: Separated from the P251-0073, P251-0074, P251-0077 and P251-0078 mounting parts so you order the right piece.
Common Questions
What does the Carrier P251-0079 do?
It is the rubber grommet that isolates the blower motor from its mounting bracket, cutting vibration and noise.
How many P251-0079 grommets do I need?
Three grommets are used to hold a motor in its mounting bracket. It is good practice to replace all three at the same time.
Is the P251-0079 the same as the P251-0078?
No. The P251-0078 is the motor mounting band, and the P251-0079 is the rubber grommet. They are separate parts in the same Carrier P251 mounting family.
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.