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


When your furnace is running properly, it should deliver warmth without creating too much disruption. While it’s common to notice your furnace making noise as it begins running, other sounds are showing your furnace requires immediate professional assistance.

Here are some of the most frequent furnace noises and what they can be signaling. If your furnace is making a weird noise, our friendly heating pros are here to fix the problem with the best furnace repair in Huffman, TX.

  1. Furnace Making a Banging Noise
    You could have a serious problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be a few problems. These range from gas accumulating in your furnace or a ductwork situation.

    Banging Sounds Coming from Your Furnace

    Your heating system turns grimy as time passes, so that’s why it’s essential to set yearly furnace maintenance with Air Houston Mechanical LLC. One of the tasks our pros do during this service is clean your furnace’s burners. When this part gets grubby, you might hear your furnace making a loud rumbling noise after ignition takes longer than normal. The resulting gas buildup can crack your furnace’s heat exchanger, where natural gas turns into warmth. Any cracks in it can discharge carbon monoxide, which is normally emitted outdoors. This dangerous gas can be lethal in large concentrations.

    If you’re hearing banging or knocking sounds coming from your furnace, Air Houston Mechanical LLC advises turning it off and calling us at (832) 501-3419. Significant natural gas in your furnace or a ruptured heat exchanger is a serious issue that necessitates immediate attention.

    Banging Sounds Coming from Your Ductwork

    Your furnace uses ductwork to move warm air around your house. If the ductwork wasn’t installed right or is getting old, it can be loud when your furnace runs. This can be the case if your furnace makes a banging noise when it shuts off. Call Air Houston Mechanical LLC at (832) 501-3419 and we’ll figure out the problem.

  2. Furnace Making a Buzzing Noise
    If you notice your furnace making a buzzing noise, don’t delay to call us. A buzzing sound often indicates an electrical problem, like with its transformer, blower motor, or capacitor.

    Your furnace uses an internal transformer to work on the proper voltage. If wires or the box needs to be tightened, you might hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves warm or chilly air around your home, and a capacitor, which turns on the motor. If either of these parts is fading, they will buzz when the furnace turns on.

  3. Furnace Making a Rattling Noise
    If your furnace is making a rattling noise, it may be related to something little, like an unfastened screw, or something major, like a broken piece. In either case, we recommend shutting off your furnace and contacting our heating specialists at (832) 501-3419 for support.
  4. Furnace Making a Squealing Noise
    If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to tell you it needs some TLC. If you’ve skipped furnace maintenance recently, belts could be worn out or a bearing may need to be greased. We are aware that maintenance often slips your mind, but our techs can get your furnace operating quietly again fast.
  5. Furnace Making a Whistling Noise
    When you’re noticing your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You may also be aware of whistling while the furnace is operating if a floor vent is loose. If you’ve examined your vents but are still sensing sound, Air Houston Mechanical LLC can provide support. It’s essential to get loose ductwork repaired fast since it can result in comfort issues in your home and increase your energy costs.
  6. Furnace Making a Grinding Noise
    It’s not a positive sign if you hear your furnace making a grinding noise. This metal-on-metal noise often means there’s an issue with your furnace’s blower. Shut down your furnace off now and call our professionals at (832) 501-3419 for help.
  7. When you’re getting a weird noise from your furnace, Air Houston Mechanical LLC is here to support you. Contact us at (832) 501-3419 to request your furnace repair appointment today.

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