When your furnace is working correctly, it should provide warm air without generating too much disruption. While it’s common to notice your furnace making noise as it begins running, other disruptions are indicating your furnace requires immediate professional support.

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

1. Furnace Makes Banging or Knocking Sounds

You could have a critical problem on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it can indicate there could be a couple of problems. These include gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over the years, so that’s why it’s critical to book routine furnace maintenance with Service Max Heating & Air Conditioning. One of the tasks our pros complete during this service is clean your furnace’s burners. When this component gets grimy, you might hear your furnace making a loud rumbling noise if ignition takes longer than normal. The subsequent gas buildup may break your furnace’s heat exchanger, where natural gas changes into heat. Any breaks in it can leak carbon monoxide, which is ordinarily released away from your home. This toxic gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Service Max Heating & Air Conditioning urges you to turn it off and calling us at 360-255-5857. Too much natural gas in your furnace or a ruptured heat exchanger are hazardous troubles that require fast service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move heated air across your residence. If the ductwork wasn’t put in correctly or is getting old, it can be noisy when your furnace is heating. This can be the case if your furnace makes a banging noise when it shuts off. Call Service Max Heating & Air Conditioning at 360-255-5857 and we’ll figure out 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 uses an internal transformer to run on the right voltage. If wires or the box isn’t tight enough, you may notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which distributes hot or cold air across your residence, and a capacitor, which turns on the motor. If either of these components are failing, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be due to something little, like a loose screw, or something critical, like a broken component. In either case, we advise shutting your furnace off and getting in touch with our heating specialists at 360-255-5857 for help.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to tell you it could use some TLC. If you’ve neglected furnace maintenance recently, belts could be worn out or a bearing may need to be lubed. We realize that maintenance sometimes slips your mind, but our professionals can get your furnace heating quietly again fast.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re hearing your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You could also be aware of whistling while the furnace is running if a floor vent isn’t secure. If you’ve examined your vents but are still sensing noise, Service Max Heating & Air Conditioning can assist you. It’s critical to get loose ductwork fixed quickly, because it can create comfort troubles in your house and drive up your energy costs.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal racket often means there’s trouble with your furnace’s blower. Shut down your furnace off now and contact our professionals at 360-255-5857 for help.

When you’re hearing an uncommon noise from your furnace, Service Max Heating & Air Conditioning is here to support you. Contact us at 360-255-5857 to request your furnace repair appointment right away.