When your furnace is running correctly, it should give warm air without generating too much sound. While it’s expected to notice your furnace making noise as it turns on, other sounds are indicating your furnace requires immediate professional support.

Here are some of the most reported furnace noises and what they might be indicating. If your furnace is making a weird noise, our friendly heating pros are here to fix the problem with the best furnace repair in Mason City, Iowa.

1. Furnace Makes a Banging Sound

You might have a critical issue on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be a couple of problems. These involve gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes grimy over the years, so that’s why it’s critical to book seasonal furnace maintenance with Mechanical Air Systems Co. One of the jobs our professionals complete during this service is clean your furnace’s burners. When this part gets dirty, you might hear your furnace making a loud rumbling noise when ignition takes longer than normal. The ensuing gas buildup can break your furnace’s heat exchanger, where natural gas turns into warm air. Any breaks in it can emit carbon monoxide, which is normally emitted outdoors. This toxic gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Mechanical Air Systems Co recommends turning it off and calling us at 641-243-4654. Significant natural gas in your furnace or a fractured heat exchanger are critical problems that necessitate fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver heated air around your house. If the ductwork wasn’t installed properly or is aging, it can be loud when your furnace runs. This may be the case if your furnace makes a banging noise when it shuts off. Contact Mechanical Air Systems Co at 641-243-4654 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t hesitate 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 operate 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 uses a blower motor, which moves warm or cooled air across your rooms, 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 Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it may be related to something minor, like an unsecure screw, or something serious, like a broken component. In either case, we urge you to shut your furnace off and contacting our heating specialists at 641-243-4654 for support.

4. Furnace Making a Squealing Noise

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

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 could also hear whistling while the furnace is on if a floor vent isn’t tight. If you’ve looked at your vents but are still hearing noise, Mechanical Air Systems Co can assist you. It’s important to get loose ductwork taken care of quickly, as it can create comfort issues in your home and drive up 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 racket often means there’s an issue with your furnace’s blower. Shut down your furnace off right away and call our pros at 641-243-4654 for assistance.

When you’re hearing an atypical noise from your furnace, Mechanical Air Systems Co is available to help. Contact us at 641-243-4654 to schedule your furnace repair appointment today.