FENWAL 35-705505-017 Fenwall Automatic Ignition 120VAC 1.5A

( Brand: Fenwal ), ( Manufacturer Part Number: 35-705505-017 ), ( Type: Ignition Control Board ), ( Voltage: 120v ), ( Amperage: 1.5a )

Review FENWAL Fenwall Automatic Ignition System 120vac 1.5a

The **Fenwal 35-705505-017 Automatic Ignition** is a robust and reliable ignition system designed for industrial and commercial applications requiring precise, low-maintenance ignition control. Engineered for use with gas-fired equipment, including furnaces, boilers, and water heaters, this automatic ignition module operates on a **120VAC, 1.5A** power supply, ensuring compatibility with standard electrical systems while delivering consistent performance under demanding conditions. Built with Fenwal s reputation for durability and precision, this unit features a **pneumatic or electronic control interface**, allowing seamless integration with existing automation systems, thermostats, or direct digital controls. The ignition system employs a **spark ignition mechanism**, providing rapid and reliable flame initiation with minimal pilot gas consumption, making it an energy-efficient choice for continuous operation. Its compact yet sturdy design ensures easy installation in tight spaces, while the enclosed housing protects internal components from dust, moisture, and environmental contaminants, enhancing longevity and operational reliability. Ideal for applications where safety and dependability are paramount, the Fenwal 35-705505-017 is equipped with fail-safe features, including flame detection and automatic reset capabilities, to prevent unsafe operating conditions. Whether used in residential heating systems or large-scale industrial processes, this ignition module delivers consistent performance with minimal maintenance, making it a trusted solution for engineers and technicians seeking a dependable ignition control system.

The **Fenwal 35-705505-017 Automatic Ignition** is a 120VAC, 1.5A unit designed for automatic gas appliance ignition systems, commonly used in furnaces, water heaters, and other gas-fired equipment. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Reliability and Durability**

The Fenwal brand is well-established in the HVAC and industrial automation sectors, known for producing robust and long-lasting components. This automatic ignition system is designed to withstand frequent use, reducing the likelihood of premature failure.

2. **Automatic Operation**

The unit eliminates the need for manual ignition, improving convenience and safety by automatically initiating the ignition process when the gas valve opens. This is particularly useful in systems where consistent, reliable startup is critical.

3. **Compatibility**

This model is designed to work with a wide range of gas appliances, including furnaces, boilers, and water heaters. It is compatible with standard 120VAC power supplies and is often used in residential and light commercial applications.

4. **Low Power Consumption**

Drawing only 1.5A at 120VAC, the unit is energy-efficient and poses minimal electrical load on the system. This makes it suitable for applications where power draw is a consideration.

5. **Easy Installation**

Fenwal components are generally designed with user-friendly installation in mind. The wiring and mounting are straightforward, and the unit includes necessary terminals for secure connections. Installation guides and technical support are readily available from authorized distributors.

6. **Safety Features**

Automatic ignition systems reduce the risk of gas leaks or improper startup, which can lead to safety hazards. The unit is designed to fail-safe, meaning it will not allow gas to flow without proper ignition, minimizing the risk of carbon monoxide leaks or explosions.

7. **Long Lifespan**

With proper maintenance and usage, Fenwal ignition systems can last for many years, often outlasting the lifespan of the appliance they are installed in. This makes it a cost-effective choice in the long run.

8. **Widely Available**

Fenwal products are stocked by many HVAC supply companies and online retailers, making it easy to find replacements or accessories if needed. Parts and technical support are also widely available.

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### **Cons**

1. **Limited to 120VAC Systems**

This unit is not compatible with 24VAC or other voltage systems, which may limit its use in certain applications or regions where different voltage standards are used. If upgrading or replacing an existing system, ensure voltage compatibility.

2. **Potential for False Triggers**

Like all automatic ignition systems, this unit can occasionally misfire or fail to ignite due to issues such as dirty electrodes, gas pressure fluctuations, or electrical interference. Regular maintenance is required to prevent this.

3. **Dependence on Gas Pressure and Quality**

The ignition system relies on proper gas flow and pressure to function correctly. If the gas supply is inconsistent or contaminated, the unit may fail to ignite properly, leading to operational issues.

4. **Electrode Maintenance Required**

The spark electrodes in automatic ignition systems can wear out or become fouled over time, reducing their effectiveness. This requires periodic cleaning or replacement, adding minor maintenance overhead.

5. **Cost Relative to Manual Systems**

While the upfront cost of the Fenwal unit is reasonable, the initial investment in an automatic ignition system may be higher than a manual pilot system. However, the long-term benefits in safety and convenience often justify the cost.

6. **Limited Customization**

This is a standard off-the-shelf unit with limited customization options. If you require specific features such as adjustable delay times or additional safety protocols, you may need to explore other models or supplementary components.

7. **Potential for Electrical Issues**

Like any electrical component, the unit can be affected by power surges, poor wiring, or ground faults. Proper installation and protection (e.g., surge protectors) are necessary to mitigate these risks.

8. **Replacement Parts Availability**

While Fenwal products are widely available, some older models or less common variants may have limited replacement parts availability. Always verify the availability of parts before purchasing.

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### **Conclusion**

The **Fenwal 35-705505-017 Automatic Ignition** is a reliable, efficient, and safe choice for automatic ignition applications in gas appliances. Its durability, ease of installation, and compatibility with a wide range of systems make it a popular option for HVAC professionals and DIY enthusiasts. However, its limitations such as voltage compatibility, potential for false triggers, and the need for maintenance should be carefully considered before purchase.

If you are replacing an existing manual pilot system or upgrading an older automatic ignition unit, this Fenwal model offers a robust and dependable solution. For applications requiring specialized features or different voltage standards, alternative models may need to be explored.

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### **Recommendation**

- You are working with a standard 120VAC gas appliance (furnace, water heater, boiler).

- You prioritize reliability, safety, and ease of installation.

- You are willing to perform basic maintenance (e.g., cleaning electrodes) to ensure optimal performance.

- You have access to technical support or a knowledgeable installer to assist with setup and troubleshooting.

- Your system requires a different voltage (e.g., 24VAC).

- You need additional features such as adjustable delay times or advanced diagnostics.

- You are working with a very old or non-standard appliance that may not be fully compatible with this model.

For most standard residential or light commercial applications, the Fenwal 35-705505-017 is an excellent choice. Always verify compatibility with your specific appliance and follow manufacturer guidelines for installation and maintenance. If in doubt, consult with an HVAC professional to ensure proper integration into your system.

Details:

It operates on120 volts of electricity with a current draw of1.5 amperes. MPN: 35-705505-017 The product is a Fenwal Automatic Ignition System, specifically designed for use in HVAC and refrigeration systems.

part #: 35705505017 prices

• $116.00-$283.95

specifications hvaapa:

• brand: Fenwal
• mpn: 35-705505-017
• type: Ignition Control Board
• voltage: 120v
• amperage: 1.5a

payments hvaapa:

• credit card: Diners-club
• other
• wallet: Apple-pay

returns hvaapa:

• policy: No Returns

shipping hvaapa:

• cost: $20.90
• service: USPS Ground Advantage
• type: Calculated
• class: Standard
• carrier: USPS
• transit: 4-10 Days

general hvaapa:

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

offer hvaapa:

• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 1
• started: February 24, 2026

seller hvaapa:

• city: Phoenix, Arizona
• # reviews: 1083
• rating: 100.0%

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