When your furnace is working like it should, it should give heat without making too much noise. While it’s expected to notice your furnace making noise as it starts up, other disruptions are indicating your furnace requires immediate professional help.

Here are some of the most frequent furnace noises and what they could be indicating. If your furnace is making an odd noise, our friendly heating pros are here to help with the best furnace repair in Libertyville, Illinois.

1. Furnace Makes Banging or Knocking Sounds

You could have a critical situation on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it can signal there could be several problems. These involve gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty as time passes, so that’s why it’s important to book seasonal furnace maintenance with TopTec. One of the jobs our pros do during this service is clean your furnace’s burners. When this component gets dirty, you may hear your furnace making a loud rumbling noise if ignition takes more time. The resulting gas buildup can fracture your furnace’s heat exchanger, where natural gas transforms into heat. Any breaks in it can discharge carbon monoxide, which is ordinarily vented outdoors. This toxic gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, TopTec advises turning it off and contacting us at 847-362-0262. Significant natural gas in your furnace or a fractured heat exchanger are hazardous issues that should get fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move hot air around your home. If the ductwork wasn’t installed correctly or is getting dated, it can be noisy when your furnace is on. This may be the issue if your furnace makes a banging noise when it shuts off. Get in touch with TopTec at 847-362-0262 and we’ll figure out the problem.

2. Furnace Makes a Buzzing Sound

If you hear 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 depends on an internal transformer to run on the proper voltage. If wires or the box isn’t tight enough, you might notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves hot or cold air across your space, and a capacitor, which turns on the motor. If either of these components 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 may be related to something minor, like an unsecure screw, or something major, like a broken part. In either case, we urge you to shut your furnace off and contacting our heating specialists at 847-362-0262 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s making an effort to get your attention it could use some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be worn down or a bearing might need to be greased. We know that maintenance often slips your mind, but our pros can get your furnace operating quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re detecting your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You may also notice whistling while the furnace is running if a floor vent is loose. If you’ve examined your vents but are still hearing sound, TopTec can help. It’s important to get loose ductwork repaired without delay, because it can result in comfort troubles in your house and increase your heating costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound usually means there’s trouble with your furnace’s blower. Shut down your furnace off right away and call our pros at 847-362-0262 for help.

When you’re noticing a strange noise from your furnace, TopTec is here to help. Contact us at 847-362-0262 to schedule your furnace repair appointment now.