If you rely on a furnace to heat your home, you should ensure that it is in good condition before winter approaches. You don't want to be stuck in a cold house just because your furnace is faulty. Most furnace problems can be corrected without any difficulties. However, you need to identify these problems early enough before they get out of hand. 

But how can you identify these problems? Here are a few signs of a failing furnace. If you notice any of the following signs, call an HVAC contractor to inspect or repair your furnace.

High Heating Bills

Your heating bills shouldn't spiral out of control if your furnace is working normally. But if your energy bills are higher than usual, it's time to call an HVAC professional to check your furnace. But before you do so, check if your air ducts are properly sealed, as they might be the cause. 

If you have been doing proper maintenance and your bills are still at an all-time high, there is a good chance that some parts are worn out. A furnace repair professional can replace the worn-out parts and check if there are other existing problems. 

Weird Noises

Modern furnaces should stay quiet when running. So, if you can hear some weird noises coming from your furnace, there is a big problem. Any rattling, popping, or banging noises are a red flag. If your furnace is making these noises and blowing cold air, call an HVAC contractor right away. 

Noise and cold air are a clear indication that your furnace is on the verge of shutting down. You need to ensure that these problems are addressed as quickly as possible to prevent severe damage or accidents. 

Wrong Flame Colors

You can tell whether something is wrong with your furnace by checking the flame color. A furnace should produce a blue flame. If the flame is yellow, there is a good chance that there is incomplete combustion. The fuel in your furnace should burn in a clean and efficient manner; otherwise, the air in your home will be riddled with carbon monoxide. 

As long as your flame is not blue, you should call your HVAC contractor to diagnose the problem. While you wait for the contractor to arrive, shut down the furnace and leave your house immediately. 

The signs listed above should tell you that your furnace has a problem and needs to be checked out. Don't attempt to repair your furnace by yourself, as you might end up causing further damage.