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For decades, central heating systems like furnaces have relied on steadily burning pilot lights to maintain warm indoor temperatures. While pilot lights are still widespread, electronic ignition systems are an increasingly popular alternative for those who are replacing their units. Here's a closer look at these modern systems and why they’re becoming more commonplace.

Why Pilot Lights Are Being Phased Out

Pilot lights are small flames that burn constantly to initiate the heating cycle in traditional furnaces. Once the furnace switches on due to the thermostat setting, gas is released through a valve, reaching the pilot light, which then ignites it.

Although this arrangement is effective, it has two significant drawbacks. To begin with, a pilot light must be constantly fueled, and while the amount of gas it consumes is minimal, the cost can add up over time. Furthermore, pilot lights can occasionally extinguish themselves due to faulty thermocouples, dirty burners, or drafts. Pilot light users must then identify and resolve the problem that's interrupting their heating or consult a heating technician to repair an issue.

How Electronic Ignition Systems Work

central heating

Electronic ignition systems come in two varieties, each of which bypasses common problems in conventional pilot lights. The first is called an intermittent pilot light. These are similar to standard pilot lights in that they use a live flame to ignite gas. However, the flame is only ignited by an electric spark at the start of a new central heating cycle, thus saving significant amounts of costly fuel.

Alternatively, hot surface ignition systems are available. These consist of a metal heating element through which an electric current is channeled at the beginning of a heating cycle. Once the metal has reached a sufficiently high temperature, it will ignite the burners without needing an open flame before shutting off.

The chief advantages of these alternative systems are their greater energy efficiency, reliability, and safety. Without an open flame to blow out, these systems can be expected to switch on precisely when scheduled every time. Without a constant flow of gas, the risk of fire or carbon monoxide poisoning is reduced even further.

 

If you’re considering upgrading an aged or outdated furnace or central heating system, ask the professionals at Arnold Jones Services Heating and Air Conditioning about electronic ignition systems. Based in High Point, NC, and serving residents throughout the Piedmont Triad area since 1961, this family-owned and -operated HVAC company offers the benefit of decades of experience and the latest in leading heating and cooling solutions. Call (336) 889-9000 to discuss your heating needs and visit them online to learn more about their services.

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