LENNOX 105802-01 Furnace Control Circuit Board 1223-100 18P96

( Brand: Lennox ), ( Manufacturer Part Number: 105802-01 ), ( Type: Furnace Control Board )

Review LENNOX Furnace Control Circuit Board Used Free Shipping

The **Lennox 105802-01 18P96 Furnace Control Circuit Board (Part Number: 1223-100)** is a precision-engineered, high-performance component designed to serve as the central nervous system for Lennox s advanced gas furnaces, ensuring seamless operation, energy efficiency, and reliable comfort control. This sophisticated circuit board integrates a robust array of digital and analog controls, meticulously calibrated to regulate critical furnace functions such as ignition, combustion, airflow modulation, and safety protocols. Built with durable, high-grade materials, it features a compact yet robust design optimized for integration into Lennox s 18P series furnaces, which are renowned for their efficiency and quiet operation. The board incorporates a microcontroller-based system that continuously monitors and adjusts furnace performance in real-time, adapting to varying load demands while maintaining optimal combustion efficiency and minimizing energy waste. Key components include a high-precision flame sensor interface, a fail-safe ignition control module, and a diagnostic port for advanced troubleshooting, allowing technicians to quickly identify and resolve issues through error codes and system logs. Compatible with Lennox s proprietary communication protocols, this circuit board ensures seamless integration with thermostats, smart home systems, and other HVAC controls, enabling features like multi-stage heating, variable-speed fan operation, and enhanced indoor air quality management. Whether installed in a residential or light-commercial setting, this component is engineered to deliver long-term reliability, reducing the risk of costly downtime and extending the operational lifespan of the furnace. For technicians, its modular design simplifies replacement and repair processes, ensuring minimal disruption to homeowners while maintaining the furnace s performance standards. Overall, the Lennox 105802-01 1223-100 18P96 Furnace Control Circuit Board represents a blend of cutting-edge technology and engineering excellence, embodying Lennox s commitment to innovation and durability in heating solutions.

### **Pros and Cons of buying a Lennox 105802-01 (1223-100, 18P96) Furnace Control Circuit Board**

1. **Direct Compatibility** This part is specifically designed for Lennox furnaces with the **18P96** control board model, ensuring a proper fit and function without modification.

2. **Reliability** Lennox is a well-known brand in HVAC, and their replacement parts are generally built to last, reducing the risk of premature failure.

3. **Warranty Coverage** If purchased from an authorized Lennox dealer or through a reputable supplier, the part may come with a limited warranty, providing peace of mind.

4. **Prevents Further Damage** A faulty control board can cause erratic furnace behavior, leading to overheating, short cycling, or complete failure. Replacing it early can prevent more extensive (and costly) repairs.

5. **Ease of Installation** Since it s a direct replacement, installation is straightforward for a qualified technician, reducing labor time and potential errors.

6. **Compatibility with Modern Systems** If your furnace is relatively new, this part will integrate smoothly with existing controls, sensors, and programming.

1. **High Cost** Replacement control boards for high-end furnaces like the **18P96** can be expensive, often ranging from **$200 $400 ** depending on the supplier. This may be a significant upfront investment.

2. **Labor Dependency** If you re not a trained technician, attempting DIY replacement could void warranties, damage the board, or lead to improper installation, causing further issues.

3. **Potential for Counterfeit Parts** Purchasing from untrusted sellers (e.g., unlicensed online marketplaces) risks receiving a **fake or low-quality replica**, which may fail quickly or not work at all.

4. **Additional Diagnostics May Be Needed** If the original failure was due to a **wiring issue, sensor malfunction, or power supply problem**, replacing just the control board may not fully resolve the issue, requiring further troubleshooting.

5. **Limited Availability** Older or discontinued furnace models may have harder-to-find parts, potentially increasing lead times or forcing you to buy from secondary markets with higher prices.

6. **Possible Software/Firmware Issues** Some control boards require **reprogramming or firmware updates** after replacement, which may add to the cost if a technician must perform this step.

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### **Conclusion**

The **Lennox 105802-01 (1223-100, 18P96) furnace control circuit board** is a **necessary replacement** if your furnace is experiencing **erratic operation, error codes, or complete failure** due to a faulty control board. The **pros outweigh the cons** if:

- The part is **authentic and purchased from a trusted source** (authorized dealer, reputable HVAC supplier, or Lennox s official website).

- A **professional technician** installs it to ensure proper wiring and calibration.

- The **underlying cause** (e.g., power fluctuations, damaged wiring) is also addressed to prevent recurrence.

However, if the **cost is prohibitive** or if the furnace is **old and inefficient**, weighing the **long-term benefits against potential alternatives** (such as upgrading to a newer, more energy-efficient model) may be wise.

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### **Recommendation**

1. **Verify the Part Number** Double-check that **105802-01 (1223-100, 18P96)** is the exact model for your furnace (some Lennox models have slight variations).

- **Lennox s official website** or authorized dealers.

- **Reputable HVAC part suppliers** (e.g., HVAC Supply, Grainger, or local HVAC distributors).

- Avoid **eBay, Amazon, or unknown sellers** unless you confirm authenticity.

3. **Get a Professional Diagnosis** Before purchasing, have a **licensed HVAC technician** confirm that the control board is indeed the issue (not wiring, sensors, or power supply problems).

4. **Consider a Warranty or Financing Option** If the furnace is still under **Lennox s limited warranty**, check if the control board is covered. Some suppliers offer **payment plans** for high-cost parts.

5. **Evaluate Furnace Age & Efficiency** If the furnace is **15 years old** or has **high energy bills**, replacing just the control board may not be cost-effective in the long run. In such cases, **upgrading to a newer, more efficient model** could save money over time.

6. **Document the Repair** Keep records of the purchase, installation, and any warranty information in case of future issues.

If the control board is confirmed as the problem and the furnace is otherwise in good condition, **proceeding with the replacement is the best course of action**. However, if budget is a concern or the furnace is outdated, **consulting with an HVAC professional about system upgrades** may be a more strategic long-term solution.

Details:

The furnace board is a working pull and will come as pictured. You are buying a Used Lennox 105802-01 1223-100 18P96 Furnace Control Circuit Board.

part #: 10580201 prices

• $69.99-$540.99

specifications hvaapa:

• brand: Lennox
• mpn: 105802-01
• type: Furnace Control Board

general hvaapa:

• HVAC Refrigeration > HVAC Refrigeration: Parts Accessories > HVAC Refrigeration: Controls Circuit Boards
• condition: Used

returns hvaapa:

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

shipping hvaapa:

• class: Standard, One-day
• transit: 3-7 Days
• type: Fixed
• cost: $0.00
• carrier: UPS
• service: Standard, UPS Next Day Air

offer hvaapa:

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

seller hvaapa:

• rating: 99.2%
• city: Detroit, Michigan
• # reviews: 8531

payments hvaapa:

• wallet: Paypal
• other
• credit card: Discover

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