Are you dealing with a gas furnace that refuses to ignite on a cold day? Furnace problems happen for various reasons, from issues with the ignition system to a strong draft in your attic. If you can’t figure out why your furnace isn’t working, your best bet is usually to schedule professional furnace service in Slidell, LA.
Learn the top five reasons a gas furnace will not ignite. Just remember: If you smell gas, take no risks. Vacate your residence forthwith and reach out to Moreau’s Thermal Services to report a potential gas leak without delay
Why Gas Furnaces Won’t Ignite
Your furnace is an important part of your home’s heating system. While gas furnaces have a fairly straightforward mechanism, they can stop working because of a clogged gas line, a faulty thermostat, or even dirty burners. If your furnace only needs a filter change, you can probably do it on your own, but with most furnace problems, you should call an HVAC professional.
So, what usually prevents a gas furnace from igniting? There are several possible causes.
1. A Gas Line Problem
Sometimes, a furnace won’t ignite because of a clogged or blocked gas line. Any obstruction in the gas supply line or valve means your furnace will be unable to start.
Only a professional gas technician can resolve gas line problems. A tech will check whether there is any debris blocking your gas source.
It’s also possible that your furnace simply needs a bigger gas line. A gas technician can confirm this using a pressure gauge. If there’s too little gas going into your furnace, the technician may suggest installing an adapter to increase your gas flow.
2. Failed Ignition System
If your furnace suddenly stops working without warning, it’s often because the electronic ignition system or standing pilot light failed. When an HVAC tech arrives to inspect your furnace, they’ll check both of these components.
If the problem is the standing pilot light, the furnace ignition will start working normally but shut off after a few minutes. If you hear a clicking noise from your furnace’s ignition, but it won’t ignite at all, you likely need a new ignition system.
3. A Thermostat Issue
If your furnace’s thermostat malfunctions, your furnace may fail to turn on or heat your home properly. A technician can easily check whether there’s a problem with the thermostat and replace it if necessary.
Sometimes, all your thermostat needs is shifting to a different position. Direct sunlight or drafts could mess up your thermostat’s sensors, but adjusting its location should solve this problem.
4. A Faulty Flame Sensor
You may also experience furnace issues if the flame sensor fails. The flame sensor is a device that shuts your furnace down if it detects no flame within a few seconds after the gas valve opens. This is an extremely important safety measure that prevents carbon monoxide leaks and gas explosions.
If the sensor doesn’t detect a flame even though it’s present, your furnace won’t work. Sometimes, a flame sensor only needs cleaning to work properly again, but if it’s broken or cracked, you’ll need to replace it.
5. Dirty or Rusty Gas Burners
Dirt and rust can accumulate on your gas burners. This causes uneven burning and could even cut off air supply. Without enough oxygen, the burners won’t light. An HVAC tech can clean and adjust your gas burners if that’s what’s causing the problem.
Call Moreau’s Thermal Services for Fast, Reliable Furnace Repair in Slidell, LA
If your gas furnace will not ignite, call the heating pros at Moreau’s Thermal Services. Our team will solve the problem as quickly as possible so you can enjoy a comfortable home again. We can also let you know when to replace your furnace if your old furnace doesn’t work as efficiently anymore. Call (985) 781-6333 or fill out our contact form to schedule furnace services in Slidell, LA.
