When your furnace is operating correctly, it should deliver warmth without creating too much noise. While it’s common to catch your furnace making noise as it turns on, other disruptions are showing your furnace should get immediate professional help.

Here are some of the most frequent furnace noises and what they might be signaling. If your furnace is making a weird noise, our friendly heating specialists are here to help with the best furnace repair in Phoenix, Arizona.

1. Furnace Makes Banging or Knocking Sounds

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

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy over the years, so that’s why it’s important to schedule annual furnace maintenance with Dial One Mears Air Conditioning & Heating Inc. One of the tasks our technicians do during this service is clean your furnace’s burners. When this part gets dirty, you might hear your furnace making a loud rumbling noise when ignition takes longer than normal. The ensuing gas buildup can crack your furnace’s heat exchanger, where natural gas turns into warmth. Any breaks in it can leak carbon monoxide, which is normally emitted outside. This dangerous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Dial One Mears Air Conditioning & Heating Inc recommends turning it off and contacting us at 602-789-3315. Significant natural gas in your furnace or a ruptured heat exchanger are dangerous troubles that should get prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move warm air around your residence. If the ductwork wasn’t put in properly or is aging, it can make a lot of noise when your furnace runs. This might be the issue if your furnace makes a banging noise when it shuts off. Call Dial One Mears Air Conditioning & Heating Inc at 602-789-3315 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

If you observe your furnace making a buzzing noise, don’t delay calling us. A buzzing sound often means there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to work on the right voltage. If wires or the box is loose, you may detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves heated or cooled air around your rooms, and a capacitor, which turns on the motor. If either of these components are going out, 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 a loose screw, or something critical, like a broken piece. In either case, we urge you to shut your furnace off and contacting our heating pros at 602-789-3315 for assistance.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s making an effort to get your attention it needs some TLC. If you’ve neglected furnace maintenance the past few years, belts could be worn out or a bearing may need to be lubricated. We know that maintenance sometimes slips your mind, but our professionals can get your furnace operating quietly again fast.

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 hear whistling while the furnace is working if a floor vent isn’t tight. If you’ve examined your vents but are still noticing noise, Dial One Mears Air Conditioning & Heating Inc can assist you. It’s important to get loose ductwork repaired fast, since 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 good sign if you notice your furnace making a grinding noise. This metal-on-metal noise usually means there’s an issue with your furnace’s blower. Shut down your furnace off promptly and call us at 602-789-3315 for assistance.

When you’re hearing a strange noise from your furnace, Dial One Mears Air Conditioning & Heating Inc is ready to help. Contact us at 602-789-3315 to book your furnace repair appointment right away.