When your furnace is running properly, it should give warm air without making too much disruption. While it’s common to catch your furnace making noise as it starts up, other noises are signaling your furnace should get immediate professional help.

Here are some of the most common furnace noises and what they can be indicating. If your furnace is making a weird noise, our friendly heating professionals are here to help with the best furnace repair in Justin, Texas.

1. Furnace Makes a Banging Sound

You might have a critical issue on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it may mean there could be several problems. These range from gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over time, so that’s why it’s critical to set annual furnace maintenance with Pepper AC & Heat. One of the jobs our pros complete during this appointment is clean your furnace’s burners. When this piece gets grimy, you might hear your furnace making a loud rumbling noise when ignition takes more time. The resulting gas buildup can crack your furnace’s heat exchanger, where natural gas turns into heat. Any cracks in it can emit carbon monoxide, which is regularly vented away from your home. This hazardous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Pepper AC & Heat advises turning it off and calling us at 940-202-1184. Significant natural gas in your furnace or a ruptured heat exchanger are serious issues that should get fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move warm air across your house. If the ductwork wasn’t installed properly or is aging, it can be loud when your furnace is heating. This might be the case if your furnace makes a banging noise when it shuts off. Get in touch with Pepper AC & Heat at 940-202-1184 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you observe your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound usually is telling you there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to operate on the proper voltage. If wires or the box needs to be tightened, you may hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends heated or cooled air across your residence, and a capacitor, which starts the motor. If either of these pieces are going out, they will buzz when the furnace turns on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it could be the result of something little, like a loose screw, or something serious, like a broken component. In either case, we recommend shutting off your furnace and getting in touch with our heating professionals 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 going, it’s attempting to tell you it needs some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn out or a bearing might need to be lubed. We know that maintenance often slips your mind, but our pros can get your furnace running quietly again rapidly.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You may also be aware of whistling while the furnace is on if a floor vent is loose. If you’ve checked your vents but are still sensing noise, Pepper AC & Heat can help. It’s important to get loose ductwork taken care of without delay, because it can create comfort troubles in your home and increase your energy bills.

6. Furnace Making a Grinding Noise

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal racket often means there’s a problem with your furnace’s blower. Switch off your furnace off promptly and call our pros at 940-202-1184 for help.

When you’re hearing a strange noise from your furnace, Pepper AC & Heat is here to help. Contact us at 940-202-1184 to schedule your furnace repair appointment today.