When your furnace is running like it should, it should provide heat without generating too much sound. While it’s normal to hear your furnace making noise as it begins running, other disruptions are showing your furnace requires immediate professional help.

Here are some of the most reported furnace noises and what they could mean. If your furnace is making an odd noise, our friendly heating specialists are here to assist with the best furnace repair in Libertyville, Illinois.

1. Furnace Makes Banging or Knocking Sounds

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

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over time, so that’s why it’s essential to set seasonal furnace maintenance with TopTec. One of the things our professionals do during this service is clean your furnace’s burners. When this component gets grimy, you could hear your furnace making a loud rumbling noise when ignition takes more time. The subsequent gas buildup may break your furnace’s heat exchanger, where natural gas turns into warmth. Any cracks in it can leak carbon monoxide, which is ordinarily emitted away from your home. This dangerous gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, TopTec advises turning it off and reaching us at 847-362-0262. Too much natural gas in your furnace or a broken heat exchanger are hazardous issues that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

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

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t wait to call us. A buzzing sound typically indicates an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the correct voltage. If wires or the box needs to be tightened, you could notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes heated or chilly air around your residence, and a capacitor, which starts the motor. If either of these parts are fading, 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 could be related to something little, like an unsecure screw, or something serious, like a broken piece. In either case, we advise shutting 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 tell you it could use some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn out or a bearing could need to be lubed. We realize that maintenance frequently slips your mind, but our techs can get your furnace heating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You could also be aware of whistling while the furnace is on if a floor vent is loose. If you’ve looked at your vents but are still noticing sound, TopTec can assist you. It’s important to get loose ductwork repaired quickly, because it can create comfort troubles in your residence and increase your utility expenses.

6. Furnace Making a Grinding Noise

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal noise often means there’s an issue with your furnace’s blower. Turn off your furnace off right away and call our pros at 847-362-0262 for assistance.

When you’re noticing an uncommon noise from your furnace, TopTec is available to support you. Contact us at 847-362-0262 to book your furnace repair appointment now.