When your furnace is operating properly, it should deliver warm air without creating too much noise. While it’s expected to hear your furnace making noise as it turns on, other sounds are indicating your furnace requires immediate professional assistance.

Here are some of the most frequent furnace noises and what they could be signaling. If your furnace is making a strange noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Justin, Texas.

1. Furnace Making a Banging Noise

You might have an urgent issue on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can signal there could be a couple of problems. These range from gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over time, so that’s why it’s essential to set annual furnace maintenance with Pepper AC & Heat. One of the things our pros perform during this work is clean your furnace’s burners. When this part gets grimy, you could hear your furnace making a loud rumbling noise when ignition is delayed. The following gas buildup might break your furnace’s heat exchanger, where natural gas turns into warm air. Any fractures in it can leak carbon monoxide, which is regularly vented outdoors. This dangerous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Pepper AC & Heat recommends turning it off and contacting us at 940-202-1184. Excessive natural gas in your furnace or a broken heat exchanger are dangerous issues that require fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move hot air around your house. If the ductwork wasn’t installed right or is getting dated, it can make a lot of noise when your furnace runs. This might be the case if your furnace makes a banging noise when it shuts off. Call Pepper AC & Heat at 940-202-1184 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you notice your furnace making a buzzing noise, don’t delay calling us. A buzzing sound frequently is telling you there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to work on the proper voltage. If wires or the box is loose, you could detect a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves warm or chilly air around your home, and a capacitor, which turns on the motor. If either of these pieces are failing, they will buzz when the furnace starts.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it can be related to something minor, like an unfastened screw, or something critical, like a broken component. In either case, we advise shutting your furnace off and contacting our heating pros at 940-202-1184 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to get your attention it requires some TLC. If you’ve neglected furnace maintenance recently, belts could be worn down or a bearing might need to be greased. We know that maintenance often slips your mind, but our professionals can get your furnace running quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You could also notice whistling while the furnace is on if a floor vent isn’t secure. If you’ve examined your vents but are still noticing whistling, Pepper AC & Heat can provide support. It’s important to get loose ductwork taken care of fast, as it can result in comfort problems in your home and increase your heating costs.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal racket often means there’s a problem with your furnace’s blower. Shut down your furnace off immediately and contact our professionals at 940-202-1184 for help.

When you’re hearing a weird noise from your furnace, Pepper AC & Heat is ready to support you. Contact us at 940-202-1184 to request your furnace repair appointment today.