When your furnace is running like it should, it should deliver warm air without creating too much noise. While it’s common to notice your furnace making noise as it starts up, other sounds are signaling your furnace requires immediate professional help.

Here are some of the most reported furnace noises and what they could be signaling. If your furnace is making a strange noise, our friendly heating professionals are here to assist with the best furnace repair in Houston, Texas.

1. Furnace Makes a Banging Sound

You might have a critical problem on your hands if you’re noticing 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 range from gas building up in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over time, so that’s why it’s important to set annual furnace maintenance with Air Current AC & Heat. One of the things our techs do during this appointment is clean your furnace’s burners. When this part gets dirty, you could hear your furnace making a loud rumbling noise when ignition takes longer than normal. The ensuing gas buildup can fracture your furnace’s heat exchanger, where natural gas transforms into heat. Any cracks in it can leak carbon monoxide, which is normally vented outdoors. This hazardous gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Air Current AC & Heat urges you to turn it off and reaching us at 713-322-4318. Significant natural gas in your furnace or a broken heat exchanger are dangerous troubles that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver heated air throughout your house. If the ductwork wasn’t put in properly or is getting dated, it can make a lot of noise when your furnace is heating. This can be the problem if your furnace makes a banging noise when it shuts off. Contact Air Current AC & Heat at 713-322-4318 and we’ll figure out the problem.

2. Furnace Makes a Buzzing Sound

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

Your furnace uses an internal transformer to operate on the proper voltage. If wires or the box isn’t tight enough, you may detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes warm or chilly air throughout your house, and a capacitor, which triggers the motor. If either of these pieces are going out, they will buzz when the furnace starts.

3. Furnace Rattles

If your furnace is making a rattling noise, it could be due to something little, like an unsecure screw, or something serious, like a broken part. In either case, we urge you to shut your furnace off and contacting our heating specialists at 713-322-4318 for help.

4. Furnace Making a Squealing Noise

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

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You may also be aware of whistling while the furnace is on if a floor vent isn’t secure. If you’ve examined your vents but are still sensing whistling, Air Current AC & Heat can provide support. It’s important to get loose ductwork fixed fast, since it can create comfort problems in your residence and inflate your energy expenses.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal noise typically means there’s an issue with your furnace’s blower. Turn off your furnace off now and reach our professionals at 713-322-4318 for assistance.

When you’re noticing a strange noise from your furnace, Air Current AC & Heat is available to support you. Contact us at 713-322-4318 to request your furnace repair appointment right away.