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WHITE-RODGERS 663-1 Cad Cell Relay Intermittent Ignition Oil R79R Boiler Control

663-1 White-rodgers R79r Cad Cell Relay Intermittent Ignition Oil Boiler Control

( Brand: White-rodgers ), ( Manufacturer Part Number: 663-1 ), ( Part Type: Ignition Oil Control Cell Boiler ), ( Compatible Brand: Rebuilt By Sid Harveys ), ( Power Source: Oil ), ( Country Of Origin: United States )

Review WHITE RODGERS Cad Cell Relay Intermittent Ignition Oil Boiler Control

The **White-Rodgers 663-1 R79R CAD Cell Relay** is a high-performance, precision-engineered control component designed specifically for intermittent ignition oil boiler systems, ensuring reliable and efficient operation in residential and light commercial heating applications. This robust relay operates as a critical interface between the boiler s control board and the combustion air damper (CAD) cell, enabling seamless modulation of airflow to optimize combustion efficiency while maintaining safety and compliance with modern emissions standards. Constructed with a durable, high-quality white plastic housing, the relay is built to withstand the demanding thermal and electrical cycles inherent in boiler operation, offering long-term reliability even in harsh environmental conditions. Its compact yet sturdy design allows for easy integration into existing control panels, minimizing installation complexity while maximizing functionality.

At the heart of the 663-1 R79R is an advanced **normally open (NO) switching mechanism**, which activates the CAD cell to regulate the combustion air intake during the boiler s ignition and operational phases. This intermittent ignition capability ensures that the boiler fires only when necessary, conserving fuel and reducing wear on the ignition system while maintaining consistent temperature control. The relay s **low-power switching capability** allows it to handle the delicate signals required to trigger the CAD cell without overloading the control circuit, thereby preventing premature failure of sensitive components. Additionally, its **high-current contact rating** ensures robust performance even under peak load conditions, making it ideal for systems with variable demand.

One of the standout features of the White-Rodgers 663-1 R79R is its **compatibility with a wide range of boiler control systems**, including those utilizing **microprocessor-based thermostats and smart heating controls**. The relay s **plug-and-play design** eliminates the need for extensive wiring modifications, as it connects directly to the CAD cell circuit with standard terminal connections, reducing installation time and potential for error. Its **fail-safe design** incorporates internal protection mechanisms to prevent unintended activation, further enhancing system stability and safety. Whether installed in a new boiler setup or as a replacement for an aging component, this relay delivers consistent performance, helping to extend the lifespan of the entire heating system while ensuring optimal combustion efficiency and minimal operational downtime.

For technicians and installers, the 663-1 R79R offers a balance of **simplicity and sophistication**, combining straightforward functionality with the precision required for modern oil-fired heating systems. Its **universal application** makes it a versatile solution for a variety of boiler models, from high-efficiency condensing units to traditional atmospheric burners, ensuring broad compatibility across different manufacturers. With a focus on **durability and reliability**, this relay is engineered to perform under the stress of frequent cycling, temperature fluctuations, and electrical surges, making it a trusted component in both new installations and retrofits. By integrating seamlessly with intermittent ignition systems, the White-Rodgers 663-1 R79R CAD Cell Relay helps homeowners and businesses achieve **energy-efficient, low-emission heating** while maintaining the longevity of their boiler equipment.

### **Pros and Cons of buying a White-Rodgers 663-1 R79R CAD Cell Relay (Intermittent Ignition Oil Boiler Control)**

#### **Pros:**

1. **Compatibility with Oil Boilers** Designed specifically for intermittent ignition oil boilers, ensuring proper operation with systems that require a CAD (Continuous Air Demand) cell relay for safe and efficient combustion.

2. **Reliability for Intermittent Ignition Systems** The R79R model is engineered to handle the cycling nature of intermittent ignition boilers, reducing wear on the boiler s ignition components over time.

3. **Energy Efficiency** By properly managing the ignition cycle, the relay helps optimize fuel combustion, potentially improving boiler efficiency and reducing unnecessary energy consumption.

4. **Long Lifespan** High-quality construction and robust components suggest durability, reducing the need for frequent replacements compared to cheaper alternatives.

5. **Easy Installation** As a direct replacement part, it should fit standard intermittent ignition oil boiler setups with minimal wiring adjustments, making it a straightforward upgrade or repair option.

6. **Prevents Premature Ignition Failures** A faulty relay can cause repeated ignition attempts, leading to wear on the boiler s ignition electrode. A reliable relay helps maintain consistent ignition performance.

7. **Widely Available and Supported** White-Rodgers is a trusted brand in boiler controls, meaning parts and technical support are likely readily accessible.

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#### **Cons:**

1. **Cost** Compared to generic or aftermarket relays, this part may be more expensive, which could be a concern for budget-conscious buyers.

2. **Potential Overkill for Some Systems** If the boiler is relatively new or has a simple ignition system, a more basic relay might suffice, making this a pricier solution than necessary.

3. **Requires Proper Installation** While designed for ease of use, incorrect wiring or installation could lead to malfunctions. Users unfamiliar with boiler controls may need professional assistance.

4. **Limited to Specific Applications** This relay is tailored for intermittent ignition oil boilers. If the boiler uses a different ignition method (e.g., standing pilot or electronic ignition), this part will not be compatible.

5. **Age of the Product** Older models may lack modern features like diagnostics or smart controls, which could be a drawback if upgrading to newer technology is a priority.

6. **Availability of Replacement Parts** While White-Rodgers is reliable, if the relay fails again, sourcing a replacement may take longer than for more commonly stocked parts.

7. **Potential for Counterfeit Parts** As with any branded component, there is a risk of purchasing a counterfeit or low-quality replica, which could perform poorly or fail quickly.

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### **Conclusion**

The **White-Rodgers 663-1 R79R CAD Cell Relay** is a high-quality, specialized component ideal for intermittent ignition oil boilers. Its primary strengths lie in reliability, efficiency, and compatibility with specific boiler systems. However, its cost and niche application may not justify the purchase for all users, particularly those with simpler or newer boiler setups.

If the boiler in question is experiencing intermittent ignition issues, a faulty relay is often the culprit, and this part offers a robust solution. For those on a tight budget or with non-intermittent ignition systems, alternatives may exist, but they should be thoroughly researched to ensure compatibility.

### **Recommendation**

**Buy this relay if:**

- The boiler is an intermittent ignition oil-fired system.

- The current relay is failing, causing ignition problems or excessive wear.

- Reliability and longevity are priorities over cost.

- The user is confident in installation or has access to professional help.

**Avoid or consider alternatives if:**

- The boiler uses a different ignition method (e.g., standing pilot).

- The system is new and may not require a high-end relay.

- Budget constraints make this part prohibitively expensive compared to other options.

- The user lacks experience with boiler repairs and is unsure about installation.

For best results, verify compatibility with the boiler s manual or consult a heating professional before purchasing. If the issue persists after replacement, further diagnostics may be needed.

Details:

part #: 6631 prices

  • $85.00-$99.99

specifications hvaapa:

  • brand: White-rodgers
  • mpn: 663-1
  • part type: Ignition Oil Control Cell Boiler
  • compatible brand: Rebuilt By Sid Harveys
  • power source: Oil
  • country of origin: United States

payments hvaapa:

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

returns hvaapa:

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

general hvaapa:

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

seller hvaapa:

  • rating: 100.0%
  • city: Weirton, West Virginia
  • # reviews: 3270

offer hvaapa:

  • quantity: 1
  • sold: 0
  • availability: In Stock
  • options: Ship-to-home
  • started: June 2, 2026

shipping hvaapa:

  • service: USPS Priority Mail
  • class: Expedited
  • type: Fixed
  • cost: $14.00
  • transit: 2-6 Days
  • carrier: USPS
part type: ignition oil control cell boiler, compatible brand: rebuilt by sid harveys, power source: oil, country of origin: united states,
category: business & industrial > hvac refrigeration > hvac refrigeration: parts accessories > hvac refrigeration: controls circuit boards, sku: 18107958873822773,
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