When your furnace is operating properly, it should give warmth without generating too much sound. While it’s normal to hear your furnace making noise as it turns on, other sounds are signaling your furnace needs immediate professional assistance.

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

1. Furnace Makes a Banging Sound

You may have a critical situation on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be a few problems. These involve gas building up in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over the years, so that’s why it’s essential to book routine furnace maintenance with Northglenn Heating & Air Conditioning. One of the things our technicians do during this work is clean your furnace’s burners. When this piece gets dirty, you may hear your furnace making a loud rumbling noise if ignition takes longer than normal. The subsequent gas buildup can crack your furnace’s heat exchanger, where natural gas transforms into warm air. Any fractures in it can leak carbon monoxide, which is normally vented away from your home. This hazardous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Northglenn Heating & Air Conditioning recommends turning it off and calling us at 303-452-4146. Significant natural gas in your furnace or a cracked heat exchanger are serious troubles that should get prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move warm air across your residence. If the ductwork wasn’t put in right or is getting dated, it can be loud when your furnace runs. This might be the case if your furnace makes a banging noise when it shuts off. Contact Northglenn Heating & Air Conditioning at 303-452-4146 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace relies on an internal transformer to operate on the correct voltage. If wires or the box is loose, you might hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves warm or cold air around your home, and a capacitor, which triggers the motor. If either of these parts are failing, 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 due to something minor, like a loose screw, or something serious, like a broken component. In either case, we advise shutting your furnace off and calling our heating specialists at 303-452-4146 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to get your attention it requires some TLC. If you’ve forgotten furnace maintenance recently, belts could be worn out or a bearing might need to be lubricated. We are aware that maintenance often slips your mind, but our technicians can get your furnace heating quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You could also be aware of whistling while the furnace is operating if a floor vent isn’t secure. If you’ve examined your vents but are still noticing noise, Northglenn Heating & Air Conditioning can help. It’s important to get loose ductwork fixed without delay, since it can make comfort troubles in your residence and drive up your heating expenses.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound often means there’s trouble with your furnace’s blower. Switch off your furnace off instantly and call our pros at 303-452-4146 for support.

When you’re noticing a weird noise from your furnace, Northglenn Heating & Air Conditioning is ready to support you. Contact us at 303-452-4146 to schedule your furnace repair appointment now.