Hot water heaters are essential household appliances, and their ignition systems play a critical role in ensuring efficient and reliable operation. In recent years, intermittent ignition systems have become increasingly popular, replacing the traditional standing pilot lights in modern water heaters. This article explores the workings of intermittent ignition systems, their benefits, and the maintenance required to keep them in top condition, with a comparison to standing pilot lights.

How Intermittent Ignition Systems Work

Intermittent ignition systems, also known as electronic ignition systems, use an electric spark or a hot surface igniter to light the burner only when there is a demand for hot water. Unlike standing pilot lights that burn continuously, intermittent ignition systems activate the igniter only when the thermostat signals the need for heating. This process involves several components working together.

Components

Four main components are interdependent and make up an intermittent ignition system.

Thermostat

The thermostat monitors the water temperature and signals the control module when heating is needed. The thermostat is responsible for sending a signal to an electronic igniter to produce a spark that lights the pilot.

Control Module

The control module receives the signal from the thermostat and sends power to the igniter.

Igniter

Depending on the system, an electric spark igniter or a hot surface igniter ignites the gas burner. The burner then heats the water being called for at the tap or at a water-using appliance.

Flame Sensor

Once the burner is lit, the flame sensor detects the presence of the flame and signals the control module to stop the ignition process and continue normal operation. This reduces the chances of a gas leak or possible fires.

Advantages of Intermittent Ignition Systems

Intermittent ignition systems offer four advantages over traditional standing pilot lights.

Energy Efficiency

Since the igniter activates only when needed, intermittent ignition systems save energy by not having a continuously burning pilot light. This reduces gas consumption and lowers utility bills.

Safety

The absence of a standing pilot light minimizes the risk of gas leaks and accidental fires. Additionally, the flame sensor ensures that gas is only supplied when a flame is present, enhancing safety.

Reliability

Intermittent ignition systems are more reliable in modern hot water heaters, providing consistent performance and reducing the likelihood of pilot light outages. 

Environmental Impact

By reducing gas consumption, homeowners can save money and lower their carbon footprint, making intermittent ignition systems a more environmentally friendly option.

Maintenance Requirements

To keep intermittent ignition systems functioning optimally, regular maintenance is essential. A professional should complete key maintenance tasks and include the following services.

Cleaning the Igniter and Flame Sensor

Dust and debris can accumulate on the igniter and flame sensor, hindering their performance. Regular cleaning with a soft brush or cloth ensures proper functioning.

Inspecting Electrical Connections

Loose or corroded connections can disrupt the ignition process. Periodically checking and tightening connections can prevent ignition failures.

Checking for Gas Leaks

Although intermittent ignition systems are safer, it is still important to inspect for gas leaks. A soapy water solution can be applied to gas connections to detect leaks.

Regular Professional Servicing

Annual inspections by a qualified technician can identify and address potential issues before they become serious problems. We cannot stress enough the importance of hiring a trained technician since gas line installations, repairs, and maintenance are never considered DIY projects. The consequences of making an error are too great to take the risk!

Comparison to Standing Pilot Lights

Standing pilot lights, which are being phased out in favor of intermittent ignition systems, have several drawbacks that have been addressed through an intermittent system.

Continuous Gas Consumption

Standing pilot lights burn continuously, unnecessarily consuming more gas and increasing utility bills.

Higher Risk of Outages

Pilot lights can be blown out by drafts or other factors, requiring manual relighting and potentially leaving the household without hot water.

Increased Safety Risks

The constant flame of a standing pilot light poses a higher risk of accidental fires and gas leaks.

In contrast, intermittent ignition systems provide energy efficiency, enhanced safety, and reliable performance, making them the preferred choice for modern hot water heaters.

Looking To Learn More About Intermittent Ignition Systems For Hot Water Heaters?

Intermittent ignition systems represent a significant advancement in hot water heater technology. By using an electric spark or hot surface igniter to light the burner only when needed, these systems offer substantial benefits over traditional standing pilot lights, including energy efficiency, improved safety, and greater reliability. Proper maintenance, including regular cleaning and professional inspections, is crucial to ensuring their continued optimal performance. As the industry moves towards more sustainable and efficient solutions, intermittent ignition systems are set to become the standard in modern hot water heaters.

Call us to learn more or to upgrade your current water heater to one that takes advantage of this newer technology. Aqua Bear Plumbing and Drain can improve the reliability of your heater to meet your hot water demands more efficiently!