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Solve Your Furnace Problems: 5 Reasons for Cold Furnace Air


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Furnaces are essential in keeping you comfortable at home, especially in the cooler months. If you’ve noticed that your furnace isn’t putting out as much heat as it used to, there could be several reasons.

In this article, you’ll learn some of the most common causes of this problem to get your furnace back up and running as soon as possible.

1. Blocked Air Filters

One of the most common causes of a furnace not igniting is that the air filters are blocked. When the air filters are blocked, it prevents air from flowing properly through the furnace, which can cause a number of problems.

If your furnace isn’t igniting, one of the first things you should check is whether or not the air filters are clean. If they’re dirty, simply replace them and see if that solves the problem.

2. Faulty Thermostat 

If your furnace isn’t igniting, one of the first things you should check is whether or not the thermostat is set to “heat.” If it’s not, simply adjust it and see if that solves the problem.

It’s also possible that the thermostat itself is faulty. If adjusting the setting doesn’t solve the problem, you may need to replace the thermostat entirely.

3. Clogged Furnace Lines

Clogged furnace lines are a common problem during the winter. The best way to prevent this is to have your furnace serviced before the start of the heating season. However, if you find yourself with clogged furnace lines, there are a few things you can do to try and clear them.

One thing you can do is check to see if the clog is in the main line or one of the branch lines. You can try using a plunger or snake to clear it if it is in a branch line. If the clog is in the main line, you need to call a professional to remove it.

4. Low Gas Supply

If you notice that your furnace isn’t working as well as it used to, one possibility is that you have a low gas supply. This can happen for several reasons, including a gas line leak or a gas meter problem. If you think you might have a low gas supply, the best thing to do is call your utility company and have them come out to check it.

5. Dirty Flame Sensor

Another common cause of furnaces not igniting is a dirty flame sensor. The flame sensor is a small probe near the burner assembly that detects whether or not a flame is present. If it gets dirty, it can prevent the furnace from igniting correctly.

Use a wire brush to remove any dirt or debris to clean your flame sensor. Once it’s clean, try restarting your furnace and see if that solves the problem.

Final Thoughts

While these are the most common furnace problems, they aren’t the only ones you may face. If you’re having any issues with your furnace, it’s best to call a professional to take a look.

For issues like furnace overheating or producing cool air, contact us at Climate Experts today. We offer 24/7 emergency services related to furnaces—installations, repairs, and other maintenance needs. Give us a call for more information.

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