When your furnace is operating like it should, it should deliver heat without creating too much noise. While it’s common to catch your furnace making noise as it turns on, other sounds are indicating your furnace needs immediate professional assistance.

Here are some of the most reported furnace noises and what they might be indicating. If your furnace is making an atypical noise, our friendly heating specialists are here to fix the problem with the best furnace repair in Northglenn, Colorado.

1. Furnace Makes Banging or Knocking Sounds

You may 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 include gas building up in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over the years, so that’s why it’s important to set annual furnace maintenance with Northglenn Heating & Air Conditioning. One of the things our professionals complete during this work is clean your furnace’s burners. When this piece gets grubby, you may hear your furnace making a loud rumbling noise when ignition is delayed. The following gas buildup can fracture your furnace’s heat exchanger, where natural gas transforms into warmth. Any fractures in it can leak carbon monoxide, which is normally released outside. This toxic gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Northglenn Heating & Air Conditioning urges you to turn it off and reaching us at 303-452-4146. Significant natural gas in your furnace or a cracked heat exchanger are critical issues that require fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide warm air around your residence. If the ductwork wasn’t installed properly or is aging, it can make a lot of noise when your furnace runs. This may be the case if your furnace makes a banging noise when it shuts off. Call Northglenn Heating & Air Conditioning at 303-452-4146 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

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

Your furnace relies on an internal transformer to work on the proper voltage. If wires or the box needs to be tightened, you could hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends heated or cold air around your space, and a capacitor, which starts the motor. If either of these pieces are going out, they will buzz when the furnace turns on.

3. Furnace Rattles

If your furnace is making a rattling noise, it can be the result of something minor, like an unfastened screw, or something major, like a broken part. In either case, we advise shutting your furnace off and contacting our heating specialists at 303-452-4146 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 alert you it needs some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn out 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 fast.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You could also notice whistling while the furnace is on if a floor vent is loose. If you’ve looked at your vents but are still hearing noise, Northglenn Heating & Air Conditioning can provide support. It’s critical to get loose ductwork fixed without delay, since it can create comfort problems in your house and inflate your utility bills.

6. Furnace Making a Grinding Noise

It’s not a good sign if you detect your furnace making a grinding noise. This metal-on-metal noise usually means there’s trouble with your furnace’s blower. Switch off your furnace off now and reach our professionals at 303-452-4146 for support.

When you’re hearing an atypical noise from your furnace, Northglenn Heating & Air Conditioning is available to help. Contact us at 303-452-4146 to schedule your furnace repair appointment now.