Banging, Screeching and Rattling: What 6 Ordinary Furnace Noises Signify

October 13, 2020

When your furnace is operating like it should, it should give heat without making too much disruption. While it’s common to notice your furnace making noise as it turns on, other disruptions are signaling your furnace should get immediate professional support.

Here are some of the most reported furnace noises and what they could be signaling. If your furnace is making a weird noise, our friendly heating pros are here to assist with the best furnace repair in Rapid City, SD.

1. Furnace Making a Banging Noise

You could 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 signal there could be several problems. These range from gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy as time passes, so that’s why it’s critical to book yearly furnace maintenance with Street Heating and Cooling. One of the things our techs do during this work is clean your furnace’s burners. When this part gets dirty, you may hear your furnace making a loud rumbling noise if ignition takes more time. The resulting gas buildup may fracture your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can leak carbon monoxide, which is normally released outside. This dangerous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Street Heating and Cooling advises turning it off and contacting us at 605-206-3915. Significant natural gas in your furnace or a broken heat exchanger are critical troubles that necessitate prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move heated air across your home. If the ductwork wasn’t put in right or is aging, it can be loud when your furnace is on. This can be the problem if your furnace makes a banging noise when it shuts off. Contact Street Heating and Cooling at 605-206-3915 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound often 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 right voltage. If wires or the box needs to be tightened, you might notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends hot or cold air throughout your rooms, and a capacitor, which turns on the motor. If either of these components are failing, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be the result of something little, like an unfastened 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 605-206-3915 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s attempting 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 lubed. We know that maintenance frequently slips your mind, but our technicians can get your furnace heating quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You may also hear whistling while the furnace is working if a floor vent isn’t tight. If you’ve examined your vents but are still noticing whistling, Street Heating and Cooling can provide support. It’s essential to get loose ductwork fixed quickly, because it can create comfort problems in your house and inflate your utility expenses.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal noise frequently means there’s a problem with your furnace’s blower. Switch off your furnace off now and reach our professionals at 605-206-3915 for assistance.

When you’re hearing an uncommon noise from your furnace, Street Heating and Cooling is here to help. Contact us at 605-206-3915 to request your furnace repair appointment today.