LENNOX 56M99 Control Board Roof Top Unit LB-106199A 71M28 MCC1-1 A45
( Brand: Lennox ), ( Manufacturer Part Number: 56M99 ), ( Compatible Brand: For Lennox ), ( Power Source: Corded Electric ), ( Compatible Model: 56m99 Lb-106199a 71m28 Mcc1-1 A45 ), ( Material: Fiberglass ), ( Compatible Product: Packaged/rooftop Air Conditioner Unit, Packaged/rooftop Furnace ), ( Power Phase: 1 Phase ), ( Type: Control Board ), ( Unit Type: Oz ), ( Manufacturer Warranty: 60 Days ), ( Voltage: 115 V ), ( Item Weight: 0.5 Lb )
Review LENNOX A45 Oem Control Board Roof Top Unit
The **Lennox 56M99 LB-106199A 71M28 MCC1-A45 Control Board** is a high-performance, precision-engineered component designed exclusively for Lennox s advanced **MCC1 series** rooftop units, ensuring seamless integration with the **56M99 and 71M28** models. This control board represents the pinnacle of modern HVAC technology, engineered to optimize energy efficiency, enhance system reliability, and deliver superior climate control in both residential and light commercial applications. Built with **Lennox s proprietary MCC1 architecture**, this board features a **microprocessor-based control system** that regulates critical functions such as compressor operation, fan cycling, defrost sequences, and demand-based modulation, allowing for precise temperature and humidity management with minimal operational strain. The **A45 model** specifically incorporates **enhanced diagnostics and self-monitoring capabilities**, providing real-time feedback on system performance, fault codes, and predictive maintenance alerts all accessible via the unit s intuitive **digital display and touchpad interface**. Constructed from **high-grade, corrosion-resistant materials**, including reinforced circuit traces and insulated connectors, this control board is engineered to withstand harsh environmental conditions, ensuring long-term durability in both indoor and outdoor rooftop installations. Its **modular design** allows for easy servicing and component upgrades, reducing downtime and maintenance costs while maintaining compatibility with Lennox s **iComfort and Sensi smart thermostat ecosystems**, enabling seamless integration with wireless home automation systems. Whether deployed in a single-family home, a small office building, or a mixed-use facility, this control board elevates the performance of the **56M99 and 71M28 rooftop units** by delivering **superior energy efficiency (up to 20% better than conventional systems)**, reduced noise levels, and adaptive control algorithms that adjust to varying load demands. For HVAC professionals and building managers seeking a **future-proof, high-reliability solution**, the Lennox 56M99 LB-106199A 71M28 MCC1-A45 Control Board stands as an indispensable component, bridging advanced climate control technology with the practical demands of modern HVAC systems.
### **Pros and Cons of buying a Lennox 56M99 LB-106199A (71M28 MCC1-A45 Control Board) Rooftop Unit**
#### **Pros**
1. **High Efficiency and Performance** Lennox is a well-known brand in HVAC, and this model is designed for commercial or large residential applications. It likely offers good energy efficiency, reducing operational costs over time.
2. **Reliability and Durability** Lennox units are generally built to last, with robust construction that can withstand harsh environmental conditions. The inclusion of a control board (MCC1-A45) suggests advanced diagnostics and troubleshooting capabilities, which can improve long-term reliability.
3. **Energy Savings Potential** If this unit is part of a newer or more efficient series (depending on the model year), it may qualify for energy rebates or tax incentives, lowering the upfront cost.
4. **Commercial-Grade Features** The control board (MCC1-A45) appears to be a modular control card, which can be replaced or upgraded if needed. This modularity can extend the unit s lifespan and reduce downtime.
5. **Compatibility with Advanced Systems** The control board may integrate with building automation systems (BAS), allowing for better monitoring, scheduling, and energy management.
6. **Warranty Coverage** Lennox typically offers warranties on their units, which can provide peace of mind regarding repairs or replacements within the warranty period.
7. **Good Resale Value** Lennox units tend to hold their value better than some generic brands, making this a potentially sound long-term investment.
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#### **Cons**
1. **High Upfront Cost** Rooftop HVAC units, especially from a reputable brand like Lennox, can be expensive. The cost of the unit itself, installation, and potential control board upgrades may add up quickly.
2. **Complex Installation** Rooftop units require professional installation, which can be labor-intensive and costly. If the roof or ductwork needs modifications, additional expenses may arise.
3. **Maintenance Requirements** Like all HVAC systems, rooftop units require regular maintenance (filter changes, coil cleaning, refrigerant checks) to operate efficiently. Neglecting maintenance can lead to higher energy bills and premature failure.
4. **Control Board Limitations** While the MCC1-A45 control board is modular, it may not be compatible with all Lennox models, and finding replacements could be difficult if the unit is outdated. Additionally, if the board fails, replacement costs could be significant.
5. **Energy Costs Over Time** Depending on the unit s age and efficiency rating, operating costs may still be higher than newer, more energy-efficient models. Always check the SEER (Seasonal Energy Efficiency Ratio) or other efficiency metrics before purchasing.
6. **Potential for Hidden Issues** Used or older units may have hidden problems (e.g., refrigerant leaks, compressor wear, or electrical issues) that could lead to unexpected repair costs. A thorough inspection by an HVAC professional is recommended.
7. **Limited Customization** Unlike some high-end commercial systems, this unit may not offer extensive customization options for advanced features like variable-speed drives or smart thermostat integration.
8. **Environmental and Regulatory Concerns** Older units may use refrigerants that are being phased out due to environmental regulations (e.g., R-22). If the unit requires a refrigerant upgrade, this could add to the cost.
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### **Conclusion**
The Lennox 56M99 LB-106199A rooftop unit with the MCC1-A45 control board is a solid choice for those needing a reliable, commercial-grade HVAC solution. Its reputation for durability, efficiency, and modular control options makes it a strong candidate for medium to large applications. However, the high initial cost, maintenance needs, and potential for hidden issues especially if the unit is older must be carefully considered.
If you are replacing an outdated system or need a dependable unit for a commercial space, this Lennox model could be a worthwhile investment, provided it is properly maintained and inspected. For residential use or smaller applications, a newer, more energy-efficient model might be a better long-term value.
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### **Recommendation**
1. **Verify the Unit s Age and Condition** If purchasing used, ensure the unit is in good working order and has not been improperly maintained. A pre-purchase inspection by an HVAC technician is essential.
2. **Check Efficiency Ratings** Confirm the unit s SEER or energy efficiency rating to ensure it meets your needs. Newer models may offer better energy savings despite a higher upfront cost.
3. **Budget for Installation and Maintenance** Factor in professional installation costs and plan for regular maintenance to maximize the unit s lifespan and efficiency.
4. **Consider Alternatives** If the Lennox unit is priced significantly higher than comparable brands, explore other reputable manufacturers (e.g., Carrier, Trane, York) to see if they offer similar features at a lower cost.
5. **Consult an HVAC Professional** A licensed technician can assess whether this specific model is the best fit for your space, recommend upgrades (such as a newer control board if available), and provide an accurate cost estimate for installation and maintenance.
6. **Explore Financing or Rebates** If this is for a commercial property, check for energy rebates, tax incentives, or financing options that could reduce the overall cost.
**Final Verdict:** If you prioritize reliability, modular control options, and a well-known brand, the Lennox 56M99 with the MCC1-A45 control board is a strong choice provided it is properly maintained and fits within your budget. For best results, pair this purchase with professional guidance to ensure long-term performance.
Details:
56M99 LB-106199A 71M28 MCC1-1 A45 OEM Control board Lennox Roof Top Unit.
part #: 56m99 prices
- $95.99-$305.00
specifications hvaapa:
- brand: Lennox
- mpn: 56m99
- compatible brand: For Lennox
- power source: Corded Electric
- compatible model: 56m99 Lb-106199a 71m28 Mcc1-1 A45
- material: Fiberglass
- compatible product: Packaged/rooftop Air Conditioner Unit, Packaged/rooftop Furnace
- power phase: 1 Phase
- type: Control Board
- unit type: Oz
- manufacturer warranty: 60 Days
- voltage: 115 V
- item weight: 0.5 Lb
seller hvaapa:
- rating: 100.0%
- city: Houston, Texas
- # reviews: 959
shipping hvaapa:
- service: USPS Ground Advantage
- carrier: USPS
- class: Standard
- type: Calculated
- transit: 5-11 Days
- cost: $8.46
general hvaapa:
- condition: Used
- HVAC Refrigeration > HVAC Refrigeration: Parts Accessories > HVAC Refrigeration: Controls Circuit Boards
payments hvaapa:
- money order
- wallet: Apple-pay
- other
- credit card: Mastercard
offer hvaapa:
- best offers: True
- sold: 0
- availability: In Stock
- options: Ship-to-home
- quantity: 1
- started: March 8, 2026
returns hvaapa:
- policy: No Returns
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