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A furnace that won’t light can really put a spanner in the works, especially when the temperatures plummet. That sinking feeling that comes with knowing you won’t be able to stay warm and cozy is never pleasant. Before you panic and call a company providing HVAC services—though that’s always a good option—there are a few simple checks you can perform to get your furnace working again.
We had a main line drain clog under the house. Russell was our technician and approached the problem from outside the house, working retrograde from a trap in the front yard. I was skeptical but it worked when my efforts with a cable inside the house had failed. He was very professional and pleasant to deal with. We asked him to install a cleanout closer to the house for future use and we were very satisfied with the work.
Tyler is the best! He came to our parent's house, knew exactly what the problem was, and explained it to us without the typical guesswork. I'd recommend him any time you need a good plumber.
Overall, It was a very good experience with the Service Hero team. I was able to schedule an appointment late in the night. They are truly 24x7. The help desk team was very professional, courteous, and friendly. All responses were timely. The field technician showed up on time and diagnosed the issue accurately. Kudos to the Service Hero team!
Service Hero has years of experience providing reliable and budget-friendly furnace repair and replacement services. Our HVAC technicians in La Habra, CA have seen it all when it comes to furnace issues, including units that won’t light. In this guide, we’ll share quick tips on how to fix a furnace that won’t light. Remember, if you’re not sure about your skills to fix a faulty furnace, call a local HVAC technician for help.
Is the thermostat set to "heat" and at the desired temperature? Ensure the thermostat isn't accidentally switched off or set too low. Try raising the temperature a few degrees to see if the furnace kicks on. A simple thermostat adjustment is often the solution.
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If the thermostat is correctly set, go ahead and check your circuit breaker box for any tripped breakers. Reset any tripped breakers and ensure the furnace is receiving power. Also, verify that the furnace's power switch is turned on. A lack of power will prevent the furnace from igniting.
Next, check if your home has gas service and that the gas valve near the furnace is open. If you have other gas appliances, check if they're working. If not, there might be a gas supply issue requiring professional attention. You should be very careful when you’re dealing with gas supply devices and appliances, as natural gas is extremely volatile. If you ever notice a gas leak, evacuate the premises and seek help from a professional HVAC service.
If you have an older furnace, it may be equipped with a pilot light, which is responsible for igniting the main power. Check if the pilot light is lit. If not, try relighting it following the manufacturer's instructions. For newer furnaces, listen for the ignitor clicking; if it's not clicking, the ignitor may be faulty.
Another common culprit behind a malfunctioning furnace is a dirty air filter that can restrict airflow, causing the system to overheat and shut down. The solution is to replace or clean the filter regularly for optimal performance.
Locate the reset button on the furnace (usually a red button). Press it once to reset the furnace. This can sometimes resolve minor electrical glitches. If the furnace still doesn't light, move on to the next tip. In cases where you’re constantly resetting the furnace, it could mean the issue is beyond a simple reset and requires professional expertise.
The flame sensor detects if the burner flame is present. If it's dirty, it may not detect the flame, and this could prevent the furnace from continuing to run. Carefully clean the flame sensor with fine steel wool or a light abrasive pad.
If you’ve tried to fix your malfunctioning furnace in vain, it’s advisable to reach out to a nearby company offering HVAC services. Service Hero offers a full spectrum of heating and cooling services in both residential and commercial properties. With over 40 years of experience, we have the expertise to get your furnace back up and running quickly. Contact us for reliable and affordable services, including furnace replacement.
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