When your furnace is operating properly, it should give warmth without making too much sound. While it’s normal to catch your furnace making noise as it begins running, other sounds are showing your furnace requires immediate professional help.

Here are some of the most common furnace noises and what they might mean. If your furnace is making an atypical noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Houston, Texas.

1. Furnace Making a Banging Noise

You may have an urgent situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can signal there could be a couple of problems. These include gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy over the years, so that’s why it’s critical to set yearly furnace maintenance with Air Current AC & Heat. One of the jobs our techs 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 after ignition takes more time. The ensuing gas buildup might crack your furnace’s heat exchanger, where natural gas changes into warm air. Any fractures in it can discharge carbon monoxide, which is regularly vented outdoors. This toxic gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Air Current AC & Heat urges you to turn it off and contacting us at 713-322-4318. Excessive natural gas in your furnace or a broken heat exchanger are critical problems that necessitate fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move warm air around your house. If the ductwork wasn’t designed correctly or is getting dated, it can be noisy when your furnace runs. This can be the problem if your furnace makes a banging noise when it shuts off. Call Air Current AC & Heat at 713-322-4318 and we’ll determine the problem.

2. Furnace Buzzes Constantly

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

Your furnace relies on an internal transformer to operate on the right voltage. If wires or the box is loose, you might detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes hot or cold air across your home, and a capacitor, which turns on 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 little, like a loose screw, or something major, like a broken part. In either case, we urge you to shut your furnace off and calling our heating specialists at 713-322-4318 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to get your attention it needs some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn out or a bearing might need to be lubricated. We are aware that maintenance frequently slips your mind, but our technicians can get your furnace operating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You may also be aware of whistling while the furnace is running if a floor vent isn’t tight. If you’ve looked at your vents but are still hearing noise, Air Current AC & Heat can provide support. It’s essential to get loose ductwork fixed without delay, because it can create comfort issues in your residence and drive up your utility bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound usually means there’s trouble with your furnace’s blower. Shut down your furnace off now and contact us at 713-322-4318 for support.

When you’re hearing an uncommon noise from your furnace, Air Current AC & Heat is here to provide assistance. Contact us at 713-322-4318 to request your furnace repair appointment right away.