DAYTON Driver Blower Motor Came Lennox Furnace 4M100B.

( Brand: Dayton ), ( Manufacturer Part Number: 4M100B ), ( Part Type: Driver Blower Motor ), ( Compatible Brand: For Dayton ), ( Unit Type: Unit ), ( Manufacturer Warranty: 1 Year ), ( Air Flow Volume: 1000-1999 Cfm ), ( Power Phase: 1 Phase )

Review DAYTON Direct Driver Blower Motor 4m100b. Came Off Of Working Lennox Furnace

The **Dayton 4M100B Driver Blower Motor** is a high-performance, direct-drive furnace blower motor designed to deliver exceptional efficiency, reliability, and quiet operation in residential and light commercial HVAC systems, including those manufactured by Lennox. Engineered with precision, this motor features a robust **4-inch diameter, 100 CFM (cubic feet per minute) airflow capacity**, making it ideal for medium to large heating applications where consistent airflow and energy efficiency are critical. Built with a **direct-drive design**, the 4M100B eliminates the need for belts or pulleys, reducing wear and tear while maximizing energy transfer, which translates to lower operational costs and extended component lifespan. Its **permanent split capacitor (PSC) induction motor** ensures smooth, vibration-free performance, minimizing noise levels while maintaining optimal airflow distribution throughout the ductwork.

Constructed from high-grade materials, the Dayton 4M100B is engineered for durability, featuring a **cast aluminum housing** that resists corrosion and withstands the thermal stresses of repeated heating cycles. The motor s **sealed ball bearing assembly** is precision-lubricated for reduced friction and prolonged service life, even in demanding environments where dust, moisture, or temperature fluctuations may pose challenges. Compatible with a wide range of **Lennox furnace models** and other gas or oil-fired systems, this blower motor is designed to integrate seamlessly with existing HVAC setups, offering OEM-level performance with the added advantage of Dayton s reputation for quality and innovation. Whether replacing a failing original equipment motor or upgrading an older system for improved efficiency, the 4M100B provides a dependable solution that balances power, quiet operation, and long-term reliability.

For technicians and homeowners seeking a direct replacement with minimal compatibility concerns, the Dayton 4M100B is a straightforward upgrade that maintains the original airflow dynamics of the Lennox furnace while reducing energy consumption through its efficient direct-drive mechanism. Its **universal mounting design** ensures easy installation, and the motor s **low-profile construction** allows for unobstructed airflow and straightforward integration into tight furnace bays. Backed by Dayton s commitment to quality, this blower motor is a trusted choice for professionals who demand performance without compromise, offering a balance of affordability and engineering excellence for those looking to restore or enhance their heating system s functionality.

**Pros and Cons of Buying a Dayton 4M100B Driver Blower Motor (Compatible with Lennox Furnace)**

### **Pros**

1. **Compatibility** The Dayton 4M100B is specifically designed to replace the blower motor in many Lennox furnaces, including models like the **LN5, LN6, LN7, and LN8 series**. This ensures a direct fit without major modifications, reducing installation time and potential errors.

2. **Reliability** Dayton is a well-known brand in HVAC components, known for producing durable and efficient motors. The 4M100B is a high-quality replacement part that often outperforms or matches the original equipment manufacturer (OEM) motor in terms of longevity.

3. **Energy Efficiency** Modern blower motors, including this model, are typically more energy-efficient than older, less efficient motors. This can lead to lower operational costs over time, especially if the furnace runs frequently.

4. **Quiet Operation** Dayton motors are generally designed to operate more quietly than some generic or lower-quality replacements. This is particularly beneficial in residential settings where noise reduction is important.

5. **Warranty Coverage** Many Dayton motors come with a manufacturer s warranty (often 1 5 years), providing peace of mind against premature failure. This can be a significant advantage over aftermarket parts with no warranty.

6. **Ease of Installation** Since it is a direct replacement, installation is straightforward for a qualified technician. It often requires minimal additional wiring or adjustments, reducing labor costs.

7. **Performance Consistency** The motor is engineered to maintain consistent airflow and pressure, which is critical for proper furnace operation. This helps prevent issues like uneven heating or reduced efficiency.

8. **Availability of Parts and Support** Dayton is a trusted supplier in the HVAC industry, meaning parts are widely available, and technical support is accessible if issues arise.

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### **Cons**

1. **Cost** While not excessively expensive, the Dayton 4M100B is more costly than some generic or no-name replacements. For budget-conscious consumers, this may be a drawback, especially if the motor fails shortly after installation.

2. **Potential Overkill for Older Systems** If the furnace is very old or nearing the end of its lifespan, replacing just the blower motor may not be the most cost-effective solution. A full furnace replacement might be more economical in the long run.

3. **Installation Requires Professional Expertise** While the motor itself is a direct replacement, improper installation (e.g., incorrect wiring, belt tension, or mounting) can lead to premature failure or system malfunctions. This requires a licensed HVAC technician.

4. **Limited Customization** Unlike some high-end or variable-speed motors, the Dayton 4M100B is a standard-speed motor. If the homeowner seeks advanced features like variable-speed operation for better efficiency, this motor may not suffice.

5. **Compatibility Verification Needed** While the Dayton 4M100B is compatible with many Lennox models, it is not universal. The exact model and year of the furnace must be confirmed to ensure a perfect fit. Misidentification could lead to purchasing the wrong part.

6. **Potential for Counterfeit Products** As with any popular HVAC part, there is a risk of purchasing a counterfeit or low-quality imitation, especially from untrusted sellers. Buying from authorized dealers or reputable suppliers mitigates this risk but adds to the cost.

7. **Upfront Investment** Replacing a blower motor requires purchasing the motor itself, labor costs, and potentially additional parts (e.g., belts, capacitors). This can be a significant upfront expense, though it may extend the furnace s lifespan.

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### **Conclusion**

The Dayton 4M100B Driver Blower Motor is a **high-quality, reliable, and compatible replacement** for many Lennox furnaces. Its advantages in terms of durability, efficiency, and warranty coverage make it a strong choice for homeowners looking to extend the life of their furnace without a full replacement. However, the higher cost and the need for professional installation must be weighed against the potential long-term savings and performance benefits.

For most cases where the furnace is still in decent condition but the blower motor has failed, this motor is a **recommended choice**. It strikes a balance between cost, performance, and longevity, making it a practical investment for those who prioritize quality and efficiency.

- **If the furnace is relatively new or mid-lifespan and the blower motor has failed**, the Dayton 4M100B is an excellent replacement. Its compatibility, reliability, and warranty make it a sound choice.

- **If the furnace is very old or inefficient**, consider evaluating whether a full furnace replacement (including a high-efficiency model) would be more cost-effective in the long run.

- **Always verify the exact Lennox model and year** before purchasing to ensure compatibility.

- **Hire a licensed HVAC technician** for installation to avoid voiding warranties or causing further damage.

- **Compare quotes** from multiple suppliers to ensure you are getting an authentic Dayton product at a fair price.

Details:

See second pic for tag details. Will sell for $105 without bracket. Free shipping. Furnace was replaced due to cracked exchange.

UT-1 Dayton direct drive blower fan motor. Came off of working Lennox furnace.

specifications fablowehva:

• brand: Dayton
• mpn: 4m100b
• part type: Driver Blower Motor
• compatible brand: For Dayton
• unit type: Unit
• manufacturer warranty: 1 Year
• air flow volume: 1000-1999 Cfm
• power phase: 1 Phase

returns fablowehva:

• method: Money back
• time: 30 Days
• policy: Returns Accepted
• paid by: Buyer

offer fablowehva:

• quantity: 1
• best offers: True
• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: February 2, 2026

general fablowehva:

• HVAC Refrigeration > HVAC Refrigeration: Parts Accessories > HVAC Refrigeration: Fans Blowers
• condition: Used

seller fablowehva:

• city: Magnolia, Iowa
• # reviews: 17
• rating: 100.0%

shipping fablowehva:

• class: Standard
• service: USPS Ground Advantage
• cost: $0.00
• type: Calculated
• transit: 4-10 Days
• carrier: USPS

payments fablowehva:

• wallet: Apple-pay
• money order
• credit card: Visa
• other

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