When your furnace is working like it should, it should give heat without generating too much disruption. While it’s expected to notice your furnace making noise as it begins running, other noises are indicating your furnace should get immediate professional help.

Here are some of the most common furnace noises and what they can be signaling. If your furnace is making a weird noise, our friendly heating professionals are here to help with the best furnace repair in Kearney, Nebraska.

1. Furnace Makes Banging or Knocking Sounds

You may have a critical problem on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it can mean there could be several problems. These include gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over the years, so that’s why it’s critical to book annual furnace maintenance with Thurston Heating & Air Conditioning. One of the jobs our technicians perform during this appointment is clean your furnace’s burners. When this component gets grubby, you might hear your furnace making a loud rumbling noise if ignition takes longer than normal. The resulting gas buildup may crack your furnace’s heat exchanger, where natural gas changes into warm air. Any cracks in it can emit carbon monoxide, which is normally emitted outdoors. This dangerous gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Thurston Heating & Air Conditioning recommends turning it off and reaching us at 308-624-3485. Too much natural gas in your furnace or a fractured heat exchanger are dangerous problems that require immediate attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move warm air around your residence. If the ductwork wasn’t put in correctly or is getting old, it can make a lot of noise when your furnace runs. This may be the issue if your furnace makes a banging noise when it shuts off. Contact Thurston Heating & Air Conditioning at 308-624-3485 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you observe your furnace making a buzzing noise, don’t delay calling us. A buzzing sound usually indicates an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to run on the proper voltage. If wires or the box is loose, you could hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves warm or cold air throughout your house, and a capacitor, which turns on the motor. If either of these components are failing, they will buzz when the furnace switches on.

3. Furnace Rattles

If your furnace is making a rattling noise, it may be the result of something small, like an unfastened screw, or something serious, like a broken piece. In either case, we urge you to shut your furnace off and getting in touch with our heating professionals at 308-624-3485 for support.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to tell you it requires some TLC. If you’ve neglected furnace maintenance recently, belts could be worn out or a bearing might need to be lubricated. We are aware that maintenance sometimes slips your mind, but our techs can get your furnace operating quietly again fast.

5. Furnace Whistles

When you’re hearing your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You may also notice whistling while the furnace is on if a floor vent isn’t secure. If you’ve examined your vents but are still sensing whistling, Thurston Heating & Air Conditioning can provide support. It’s important to get loose ductwork taken care of quickly, since it can make comfort problems in your house and drive up your gas bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal noise typically means there’s trouble with your furnace’s blower. Shut down your furnace off promptly and reach us at 308-624-3485 for help.

When you’re getting an uncommon noise from your furnace, Thurston Heating & Air Conditioning is available to support you. Contact us at 308-624-3485 to schedule your furnace repair appointment right away.