Furnace Ignitor Replacement Cost & Repair Guide for BC Homeowners

A faulty furnace ignitor is a common issue for homeowners in the Lower Mainland, especially during our damp, chilly winters. A bad ignitor will prevent your furnace from producing heat, so recognizing the signs early can save you from a cold home. The most common symptom is your furnace clicking on as if it is about to start, but then failing to produce any heat. You might hear the blower motor run, but no warm air will come out of your vents.

Another clear sign is a lack of the characteristic glow from the ignitor. Modern furnaces have a small viewport where you can observe the ignition sequence. If you don't see a bright, orange-yellow glow from the hot surface ignitor (HSI) shortly after the furnace starts its cycle, the part has likely failed. Short cycling is another symptom, where the furnace attempts to light, fails, and then repeats the process every few minutes. This happens because the furnace's safety controls detect the failure to ignite and shut the system down to prevent a buildup of unburned gas. Finally, a visual inspection of the ignitor itself might reveal a hairline crack or a white, ashy appearance, which indicates it needs to be replaced.

How Much Does It Cost to Replace a Furnace Ignitor in BC?

The cost to replace a furnace ignitor in British Columbia typically ranges vary based on your specific needs when done by a professional HVAC technician. This price includes both the cost of the replacement part and the labour involved. The ignitor part itself is relatively inexpensive, usually costing varies based on your specific project requirements depending on the furnace brand and model. The majority of the cost is for the technician's time and expertise.

Labour costs in the Lower Mainland and Fraser Valley can vary, but you can expect to pay for at least an hour of service. This includes the time it takes for the technician to travel to your home, diagnose the problem, retrieve the correct part, and perform the replacement. While it might seem like a simple job, hiring a licensed and experienced company like Budget Heating and Plumbing Services ensures the work is done safely and correctly, which is crucial when dealing with gas appliances. It also means the repair is backed by a warranty, giving you peace of mind.

Can I Replace a Furnace Ignitor Myself?

While it is technically possible for a homeowner with some mechanical aptitude to replace a furnace ignitor, it is a task that carries significant risks. For safety and warranty reasons, we strongly recommend hiring a licensed gas fitter for any work involving your furnace's gas and electrical systems. An improper installation can lead to dangerous gas leaks, electrical shorts, or damage to the furnace's control board, a much more expensive repair.

If you do decide to attempt this yourself, you must follow these steps precisely:

1. Turn Off All Power: Shut off the furnace at your home's main electrical panel (breaker). Also, turn off the furnace service switch, which is usually a light switch located near the furnace. 2. Shut Off the Gas Supply: Find the gas valve on the pipe leading to your furnace and turn it to the "Off" position. 3. Locate and Remove the Ignitor: Remove the furnace access panels. The ignitor is usually located near the burners. It will have two wires leading to a plastic plug. Unplug the wire connector and use a screwdriver or nut driver to remove the screw holding the ignitor in place. 4. Install the New Ignitor: CRITICAL: Do not touch the new ignitor's element (the grey or black part) with your bare hands. The oils from your skin can cause it to burn out prematurely. Handle it by its ceramic base. Carefully secure it with the mounting screw and plug in the wire connector. 5. Reassemble and Test: Replace the furnace panels, turn the gas supply back on, and then restore electrical power. Set your thermostat to call for heat and watch the new ignitor to ensure it glows and ignites the burners.

What Causes a Furnace Ignitor to Fail?

Furnace ignitors are durable, but they don't last forever. The most common cause of failure is simply old age. The constant cycle of heating to extreme temperatures (over 2000°F) and cooling down eventually causes the material to degrade and crack. A typical hot surface ignitor has a lifespan of 3 to 5 years, though this can vary.

Another frequent cause of premature failure is a dirty or clogged air filter. When your furnace filter is dirty, it restricts airflow across the heat exchanger. This can cause the furnace to run hotter than intended, putting extra stress on the ignitor and other components. We recommend checking your filter every 1-3 months and replacing it as needed to protect your system. For expert advice on your home's specific needs, consider our air quality services. Power surges from the electrical grid can also damage the delicate ignitor. If you experience frequent power issues, it may be wise to have your home's wiring inspected by a professional. You can learn more about our electrical services. Finally, physical vibrations from the furnace's operation can, over many years, contribute to the formation of micro-cracks that eventually lead to failure.

Are All Furnace Ignitors the Same?

Not all furnace ignitors are created equal. The two most common types are Silicon Carbide and Silicon Nitride. Silicon Carbide ignitors are the traditional standard, known for being effective but more fragile. They are susceptible to cracking from vibrations or mishandling. Silicon Nitride ignitors are a newer, more robust technology. They are more durable, have a longer lifespan, and are more resistant to damage. When replacing an ignitor, upgrading to a Silicon Nitride model can be a smart investment for long-term reliability, though they may cost slightly more upfront.

The Importance of Regular Furnace Maintenance

Preventing furnace ignitor failure and other common heating problems starts with regular professional maintenance. An annual tune-up from a qualified technician at Budget Heating and Plumbing Services can catch potential issues before they become no-heat emergencies. During a maintenance visit, the technician will clean and inspect all major components, including the ignitor, flame sensor, burners, and blower motor. This not only extends the life of your equipment but also ensures it runs at peak efficiency, saving you money on your FortisBC energy bills. A well-maintained furnace is a reliable furnace, especially during a cold Fraser Valley winter. Book your annual heating system maintenance today.

FAQ: Furnace Ignitor Questions Answered

How do I know if my furnace ignitor is bad?

You'll know your furnace ignitor is likely bad if your furnace clicks on but fails to produce heat, you don't see a bright orange glow through the viewport when it tries to start, or the system starts and stops repeatedly (short cycling). A visual inspection might also reveal a visible crack in the ignitor element.

Is it safe to replace a furnace ignitor myself?

For safety reasons, it is highly recommended that you hire a licensed gas technician to replace your furnace ignitor. Working with your furnace involves both high-voltage electricity and natural gas, and mistakes can lead to dangerous situations. A professional ensures the job is done correctly and safely, compliant with BC building codes.

Why won't my furnace ignitor glow?

If the ignitor isn't glowing, it usually means it has burned out and can no longer conduct electricity to heat up. This is the end of its service life. It could also be due to a loose wire connection or, in some cases, a problem with the furnace's control board that isn't sending power to the ignitor.

Can a bad ignitor cause a gas smell?

A properly functioning furnace has safety controls that shut off the gas valve if the ignitor fails to light the burners. However, if these safety features also fail, it is possible for unburned gas to accumulate. If you ever smell gas, leave your home immediately and call FortisBC's 24-hour emergency line at 1-800-663-9911.

What is the difference between a hot surface ignitor and a pilot light?

Hot surface ignitors are the modern replacement for old-style standing pilot lights. A pilot light was a small, continuously burning flame that lit the main burners. An HSI, on the other hand, is an electronic component that only heats up on demand when the thermostat calls for heat, making it much more energy-efficient.

How long does a furnace ignitor last?

A typical hot surface ignitor will last between 3 and 5 years. Its lifespan is affected by factors like the frequency of use, the cleanliness of your furnace system, and the quality of your home's electrical supply. Regular maintenance can help extend the life of your ignitor and other furnace components.

If your furnace is showing signs of a failing ignitor, don't wait for it to leave you in the cold. Contact Budget Heating and Plumbing Services at 604-343-1985 for fast and reliable furnace repair. Our licensed technicians have over 13 years of experience serving the Lower Mainland and Fraser Valley. Visit our heating services page for more information or contact us to request a free estimate online.