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

When your furnace is operating like it should, it should provide warm air without making too much sound. While it’s normal to catch your furnace making noise as it turns on, other disruptions are signaling your furnace should get immediate professional support.

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

1. Furnace Making a Banging Noise

You may have an urgent problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may 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 turns grimy over the years, so that’s why it’s essential to set seasonal furnace maintenance with Jack's Heating, Cooling, Stoves & Fireplaces. One of the jobs our techs complete during this service is clean your furnace’s burners. When this part gets grimy, you could hear your furnace making a loud rumbling noise after ignition is delayed. The following gas buildup can crack your furnace’s heat exchanger, where natural gas changes into warmth. Any cracks in it can emit carbon monoxide, which is regularly emitted outside. This hazardous gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Jack's Heating, Cooling, Stoves & Fireplaces urges you to turn it off and contacting us at 308-646-3827. Too much natural gas in your furnace or a ruptured heat exchanger are dangerous issues that should get prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide heated air around your home. If the ductwork wasn’t designed properly or is getting dated, it can make a lot of noise when your furnace runs. This could be the problem if your furnace makes a banging noise when it shuts off. Contact Jack's Heating, Cooling, Stoves & Fireplaces at 308-646-3827 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

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 correct 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 has a blower motor, which distributes warm or chilly air throughout your residence, and a capacitor, which starts the motor. If either of these components are failing, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be the result of something minor, like an unfastened screw, or something critical, like a broken piece. In either case, we urge you to shut your furnace off and calling our heating specialists at 308-646-3827 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s attempting to get your attention it requires some TLC. If you’ve forgotten furnace maintenance recently, belts could be worn down or a bearing could need to be lubed. We realize that maintenance often slips your mind, but our techs can get your furnace running quietly again fast.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You may also notice whistling while the furnace is operating if a floor vent isn’t tight. If you’ve checked your vents but are still sensing whistling, Jack's Heating, Cooling, Stoves & Fireplaces can provide support. It’s essential to get loose ductwork repaired quickly, since it can make comfort troubles in your residence and drive up your gas expenses.

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 racket often means there’s a problem with your furnace’s blower. Switch off your furnace off immediately and contact our professionals at 308-646-3827 for assistance.

When you’re hearing an uncommon noise from your furnace, Jack's Heating, Cooling, Stoves & Fireplaces is here to provide assistance. Contact us at 308-646-3827 to request your furnace repair appointment right away.

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