When your furnace is running like it should, it should give heat without creating too much sound. While it’s expected to notice your furnace making noise as it starts up, other noises are signaling your furnace requires immediate professional assistance.

Here are some of the most reported furnace noises and what they can be indicating. If your furnace is making a strange noise, our friendly heating specialists are here to help with the best furnace repair in Fresno, California.

1. Furnace Makes Banging or Knocking Sounds

You could have a serious problem on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it may signal there could be a few problems. These include gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy over time, so that’s why it’s critical to book annual furnace maintenance with Donald P. Dick Air Conditioning. One of the tasks our technicians do during this appointment is clean your furnace’s burners. When this piece gets grimy, you might hear your furnace making a loud rumbling noise after ignition takes more time. The resulting gas buildup can crack your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can discharge carbon monoxide, which is normally emitted away from your home. This toxic gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Donald P. Dick Air Conditioning recommends turning it off and contacting us at 559-255-1644. Too much natural gas in your furnace or a broken heat exchanger are critical issues that necessitate prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move warm air around your residence. If the ductwork wasn’t designed correctly or is getting dated, it can be noisy when your furnace runs. This might be the problem if your furnace makes a banging noise when it shuts off. Call Donald P. Dick Air Conditioning at 559-255-1644 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

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

Your furnace uses an internal transformer to work on the right voltage. If wires or the box is loose, you could notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves hot or cold air around your rooms, and a capacitor, which starts the motor. If either of these parts are going out, they will buzz when the furnace switches on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it can be due to something small, like an unfastened screw, or something critical, like a broken piece. In either case, we urge you to shut your furnace off and getting in touch with our heating professionals at 559-255-1644 for help.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s making an effort to alert you it requires some TLC. If you’ve neglected furnace maintenance recently, belts could be worn out or a bearing could need to be lubed. We realize that maintenance often slips your mind, but our professionals can get your furnace operating quietly again rapidly.

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 might also be aware of whistling while the furnace is operating if a floor vent isn’t tight. If you’ve looked at your vents but are still sensing whistling, Donald P. Dick Air Conditioning can assist you. It’s essential to get loose ductwork taken care of fast, since it can make comfort issues in your home and increase your utility expenses.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a good sign if you detect your furnace making a grinding noise. This metal-on-metal noise usually means there’s a problem with your furnace’s blower. Switch off your furnace off promptly and contact our professionals at 559-255-1644 for help.

When you’re hearing an atypical noise from your furnace, Donald P. Dick Air Conditioning is ready to provide assistance. Contact us at 559-255-1644 to book your furnace repair appointment now.