YORK 663679 Control Circuit Board

( Brand: York ), ( Manufacturer Part Number: 663679 ), ( Model: YORK SOURCE 663679 ), ( Part Type: Control Circuit Board )

Review YORK Source Control Circuit Board

The **York 663679 Control Circuit Board** is a precision-engineered, high-performance component designed to serve as the central nervous system for York s advanced HVAC (Heating, Ventilation, and Air Conditioning) systems, particularly those in commercial and industrial applications. This robust circuit board integrates cutting-edge digital and analog control technology to ensure seamless operation, energy efficiency, and reliable performance across a wide range of environmental conditions. Engineered with a focus on durability and adaptability, the 663679 board features a compact yet highly functional design, incorporating a sophisticated microcontroller core that facilitates real-time monitoring, diagnostics, and automated adjustments to maintain optimal system performance. Its modular architecture allows for easy integration with York s broader line of air handlers, chillers, and variable-speed drives, enabling precise control over airflow, temperature, humidity, and energy consumption while minimizing operational downtime.

At its core, the York 663679 Control Circuit Board is equipped with advanced signal processing capabilities, including high-precision sensors and feedback loops that continuously assess system parameters such as refrigerant pressure, motor load, and ambient conditions. This real-time data is processed through a robust firmware interface, which employs adaptive algorithms to optimize energy usage, extend equipment lifespan, and prevent potential failures before they occur. The board s robust construction, featuring high-quality printed circuit traces and protective shielding, ensures resistance to electrical noise, voltage spikes, and environmental stressors, making it ideal for deployment in demanding settings such as data centers, large-scale office buildings, or industrial facilities where reliability is paramount. Additionally, the board supports seamless communication protocols, including BACnet, Modbus, and proprietary York interfaces, enabling integration with building automation systems (BAS) for centralized monitoring and control.

For technicians and engineers, the York 663679 offers a user-friendly yet powerful interface, often paired with intuitive diagnostic tools that provide clear error codes and troubleshooting guidance. Its replaceable nature ensures that even in the event of component failure, the system can quickly return to full operational capacity with minimal disruption. Whether deployed in a new installation or as an upgrade to an existing York HVAC setup, this control circuit board exemplifies the brand s commitment to innovation, efficiency, and long-term reliability, making it an indispensable component for maintaining peak performance in modern climate control systems.

The York 663679 is a control board used in York HVAC systems, particularly for furnaces and air handlers. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

### **Pros of buying a York 663679 Control Circuit Board**

1. **Compatibility and Reliability**

The York 663679 is a well-documented and widely used part for York HVAC systems, particularly those manufactured between the late 1990s and early 2010s. Many technicians and homeowners have successfully replaced this board, reducing the risk of purchasing an incompatible or faulty part.

2. **Ease of Installation**

Since this is a standard control board for York systems, replacement procedures are well-documented. Most HVAC technicians are familiar with the wiring and connections, making installation relatively straightforward if done correctly. Many users report that the replacement process takes only a few hours, especially if the original board was failing due to a simple electrical issue.

3. **Cost-Effectiveness Compared to Full System Replacement**

Replacing just the control board is significantly cheaper than replacing an entire furnace or air handler. The cost of the board itself is a fraction of the price of a new HVAC unit, making it a practical solution for systems that are otherwise functional.

4. **Extended System Lifespan**

If the control board is the root cause of system malfunctions (such as erratic cycling, failure to ignite, or error codes), replacing it can restore functionality and potentially extend the life of an otherwise healthy HVAC system. This avoids premature replacement of the entire unit.

5. **Warranty and Return Options**

Many reputable suppliers (such as HVAC specialty stores, Amazon, or authorized York dealers) offer warranties or return policies. If the board is defective upon arrival, some sellers will replace it without issue, providing peace of mind.

6. **DIY-Friendly for Experienced Users**

While professional installation is recommended, experienced DIYers with basic electrical knowledge and HVAC familiarity can attempt the replacement. The process involves disconnecting power, removing the old board, and carefully reconnecting wires to the new one. Detailed wiring diagrams are often available for York models.

---

### **Cons of buying a York 663679 Control Circuit Board**

1. **Potential for Counterfeit or Low-Quality Parts**

Some sellers, particularly on third-party marketplaces, may offer counterfeit or refurbished boards that do not function as intended. These can fail prematurely or cause further system issues. Buying from authorized dealers or reputable HVAC suppliers reduces this risk but increases cost.

2. **Wiring and Connection Challenges**

The control board connects to various sensors, relays, and power sources. If the wiring is damaged, corroded, or improperly connected during replacement, it can lead to recurring problems such as short circuits, intermittent failures, or even damage to other components. This requires careful attention to detail.

3. **Compatibility Issues with Modified or Aftermarket Systems**

If the HVAC system has been modified with aftermarket parts (e.g., upgraded thermostats, variable-speed motors, or custom wiring), the York 663679 may not fully integrate. This could result in partial functionality or error codes that require additional troubleshooting.

4. **Limited Longevity of the Board Itself**

While the York 663679 is durable, electronic components can degrade over time, especially if the system is frequently cycled or exposed to power surges. In some cases, the board may fail again within a few years, necessitating another replacement.

5. **Risk of Voiding Manufacturer Warranty**

If the HVAC system is still under warranty with York or the original manufacturer, attempting a DIY replacement (especially without professional guidance) may void the warranty. This means that if the system fails shortly after replacement, the manufacturer may refuse coverage.

6. **Potential for Overlooked Underlying Issues**

If the control board fails due to an underlying problem (e.g., a failing capacitor, faulty thermostat, or damaged wiring), replacing just the board will not address the root cause. The system may continue to fail or develop new issues, leading to repeated repairs.

7. **Learning Curve for DIYers**

While the replacement itself is not overly complex, miswiring or improper handling can cause damage. DIYers without HVAC experience may struggle with:

- Identifying the correct board (some York models have similar-looking boards with different part numbers).

- Properly grounding and connecting wires.

- Testing the system post-replacement to ensure everything functions correctly.

---

### **Conclusion**

The York 663679 control circuit board is a practical and cost-effective solution for repairing York HVAC systems when the issue stems from a faulty control board. It offers compatibility, ease of installation (for experienced users), and a significant cost savings compared to full system replacement. However, it is not without risks, particularly regarding wiring errors, counterfeit parts, and potential underlying system issues.

- Confirm that the control board is indeed the problem (not the thermostat, wiring, or other components).

- Ensure a clean and correct installation.

- Provide warranty coverage for the work performed.

If you are experienced with HVAC systems and have access to wiring diagrams, a DIY replacement is feasible. However, proceed with caution, double-check connections, and test the system thoroughly after installation.

---

### **Recommendation**

1. **Verify the Problem First**

- Error codes (e.g., E01, E02, or similar on York systems).

- Failure to ignite, cycle on/off erratically, or shut down unexpectedly.

- No power to the blower motor or gas valve.

A technician can diagnose this with a multimeter or by testing other components.

2. **Purchase from a Trusted Source**

Buy the York 663679 from an authorized HVAC supplier, a reputable online retailer (such as HVAC Supply House, Home Depot, or Amazon with verified sellers), or directly from York. Avoid extremely cheap options that may be counterfeit.

3. **Consider Professional Installation**

If you are not confident in your ability to replace the board correctly, hire a licensed HVAC technician. The cost of professional installation is often offset by the risk of damaging the system or voiding warranties.

4. **Check for Warranty Coverage**

If your HVAC system is under warranty, contact the manufacturer or your installer to discuss the repair. Some warranties cover control board replacements, especially if the failure is due to a manufacturing defect.

5. **Prepare for Potential Follow-Up Repairs**

If the system continues to fail after replacing the board, there may be deeper issues (e.g., a failing capacitor, gas valve, or thermostat). Be prepared for additional diagnostics or repairs.

### **Final Verdict**

The York 663679 control circuit board is a **worthwhile investment for repairing York HVAC systems** when the problem is isolated to the control board. However, it requires careful consideration of compatibility, installation quality, and potential underlying issues. For most users, professional guidance or installation is the safest and most reliable option.

Details:

York Source 1 Control Circuit Board 663679 Fast Shipping.

part #: 663679 prices

• $119.99-$397.99

specifications hvaapa:

• brand: York
• mpn: 663679
• model: York Source 663679
• part type: Control Circuit Board

shipping hvaapa:

• type: Fixed
• class: Standard
• cost: $4.99
• service: USPS Ground Advantage
• transit: 4-10 Days
• carrier: USPS

general hvaapa:

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

returns hvaapa:

• policy: No Returns

offer hvaapa:

• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0
• started: February 7, 2026

payments hvaapa:

• credit card: Mastercard
• other
• wallet: Apple-pay

seller hvaapa:

• rating: 99.4%
• # reviews: 630
• city: Dresher, Pennsylvania

York 663679 Is Similar To:

• 025 31813 000 York Source Switch Limit Part No (43.2% similar) Oem York luxury main limit control. Opens 160 deg, closes 130 deg...(January 4th, 2019)
• 031-01796-002 York Eprom Electronic Control (35.3% similar) Manufacturer: York product code: 002SOME boxes are little dirty from being shelved and moved around new old stock...(October 21st, 2017)
• 031-02565-000 York Control Board And Door Interface (38.7% similar) The complete control board and door with hinge set is included. York control board and door interface used removed from a chiller that was replaced due to the coils. This chiller was 100 operational, just had bad coils. The 2 pictures marked start and finish are there to show boards operational, ...(May 30th, 2018)
• 03102970000 York Usb Converter Kit Cd Source (27.9% similar) Make an offer. The free net USB adaptor is a port to RS-485 converter. New old stock. Free shipping. Simply plug the converter into an available USB port on your computer after driver installation...(May 11th, 2018)
• 1np1np0701 s1-1np0701 92-0923 025-25463-000 York Source Lp Conversion Kit Res Pac Free Shipping (32.9% similar) This conversion kit will come as pictured new never used in its original box. You are buying a new in box York source 1/1 NP0701 LP conversion kit res PAC R27...(February 13th, 2019)
• Edit Mpn York Source 1 (40.6% similar) York furnace source 1 control board 121A this is a used part but was taken off of working...(September 18th, 2017)
• G23-5253-36 York High Pressure Control (42.5% similar) 50 lbs shipping DIMENSIONS:3...(November 20th, 2018)
• P031-01267-001a One Source York Furnace Control Board Ks (51% similar) 30 day warranty. Free priority shipping. This item: one source York control BOARD6IF-3 BL:D18ANSI Z21. Don't see the one you are looking for...(June 28th, 2018)
• S1-02525973700 025-25973-700 7481 Source York Coleman New Furnace Transformer (25.2% similar) You are buying on a new source 1 York s1 208 230V 24V 75VA furnace transformer. The transformer is new never used in original box. This item will come as pictured...(March 17th, 2019)
• S1-02639479000 York Source 1 Blower Wheel (41% similar) BLOWER,12 x 12,WITH hag,wheel,shaft,brag S1...(February 15th, 2017)