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Furnace Parts DIY
Lennox Blower Motors & Capacitors 668-648 replacement part for Lennox furnaces

Furnace Parts DIY

668-648 RUN CAPACITOR 40/10MFD 370/440V

$106.00

+5% Tax • Shipping calculated at checkout.

U.S. Duties/Taxes, if applicable, may be due at time of delivery.

Low stock — only 1 left

Pickup available at 75 Blue Mountain St #3, Coquitlam

Usually ready in 24 hours

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Not sure this fits your furnace? Call us — we're happy to help

Product Details

Description

This professional-grade 40/10 MFD dual run capacitor is a critical electrical component for residential and commercial HVAC systems. Designed to support both the compressor and the condenser fan motor, this dual-purpose capacitor provides the necessary phase shift to ensure efficient motor startup and continuous operation. Rated for both 370V and 440V applications, it offers high thermal stability and electrical reliability. If your air conditioning unit or heat pump is humming but not starting, or if the fan is spinning slowly, replacing the capacitor is a common and effective solution. This heavy-duty part is engineered for durability, helping to extend the lifespan of your blower motors and cooling equipment while maintaining optimal energy efficiency.

Specifications

Type
Dual Run Capacitor
Size
Standard Round
Application
Used in central air conditioning systems, heat pumps, and furnace blower motor assemblies to facilitate the starting and running of compressors and fan motors.
Specifications
Capacitance: 40 + 10 Microfarads (MFD); Voltage: 370/440 Volts AC; Frequency: 50/60 Hz; Shape: Round; Tolerance: +/- 5%

Not sure this is the right part?

Our team is happy to help you verify compatibility before you order. We'll confirm it fits your specific furnace model.

1-778-759-9864

Mon–Sat 8AM–5PM PT · Or email parts@bcfurnace.com

Common questions

Is the 668-648 RUN CAPACITOR 40/10MFD 370/440V a genuine Lennox part?

Yes. The 668-648 is a genuine Lennox OEM part, sourced from an authorized Lennox parts distributor. This Blower Motors & Capacitor is backed by our 100% compatibility guarantee — if it doesn't fit your furnace, we'll make it right.

How do I know if the 668-648 is compatible with my furnace?

The easiest way is to match the part number (668-648) with your furnace model number. Visit the homepage and enter your model number in the search bar — our system will show all compatible Blower Motors & Capacitors for your specific unit. You can also call our technicians at 1-778-759-9864 for free compatibility verification.

How fast can I get the 668-648 shipped?

Most Blower Motors & Capacitors including the 668-648 ship within 1–2 business days from our warehouse. We ship across Canada and the United States, and worldwide, with tracking on every order. For urgent furnace repairs, contact us at 1-778-759-9864 for expedited shipping options.

Can I pick up the 668-648 at your store?

Yes! Local pickup is available at our Coquitlam, BC location: 75 Blue Mountain St #3. Blower Motors & Capacitors orders are usually ready within 24 hours. Call us at 1-778-759-9864 to confirm the 668-648 is in stock before visiting.

Still not sure this is the right part? Call 1-778-759-9864 and we will check your model number with you.

Where usedFits 28 furnace models