Furnace Not Igniting? Common Causes and How to Fix It

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One of the most common wintertime HVAC issues is a gas furnace that refuses to ignite and turn on. It’s not only a frustrating problem for a homeowner, it’s one that can leave you downright cold. Of course, you can always call the pro technicians at Chandler Air when you have a gas furnace that refuses to light. However, this is a problem that you might be able to fix yourself.

Check the Gas Supply

First, you’ll want to check your gas supply. If a furnace isn’t getting gas to it, it won’t ignite. If you smell gas near the furnace, it’s likely that the gas supply isn’t the cause of the problem. If you don’t smell gas, it may be worthwhile to call the gas company.

Check Air Filters

If the air in your system is hindered by a clogged air filter, there may not be enough flowing air to ignite your heating system. So, if you’re experiencing a furnace that isn’t lighting, one of the first steps is to replace your air filters.

Check Pilot Light

Your pilot light is that small flame which is continuously burning inside your furnace. You can find it located near a tray where the burners are located. If it’s not lit, you can use a long match to carefully light it again. If that doesn’t work, it may be a bigger issue.


Another simple fix is to turn on your heater and move the thermostat to a higher setting. This may propel your furnace to ignite. If it doesn’t, you may have a faulty thermostat.

Call an HVAC Technician

Yes, there are times when home remedies won’t get your furnace to ignite. If you’ve tried the above steps, and there still is no ignition, it’s a good idea to call an HVAC technician.

At Chandler Air, we’re here for you to ensure your heating is optimal in the winter and you’re cool and comfortable in the summer. Call us at 480-899-0267 when you need HVAC service or maintenance.