When your furnace is running properly, it should give warmth without making too much sound. While it’s common to hear your furnace making noise as it turns on, other sounds are indicating your furnace needs immediate professional support.

Here are some of the most common furnace noises and what they might be signaling. If your furnace is making an atypical noise, our friendly heating specialists are here to fix the problem with the best furnace repair in Crystal and Twin Cities, Minnesota.

1. Furnace Makes Banging or Knocking Sounds

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 indicate there could be a couple of problems. These involve gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy over time, so that’s why it’s important to set seasonal furnace maintenance with GV Heating & Air. One of the tasks our techs perform during this service is clean your furnace’s burners. When this piece gets grimy, you could hear your furnace making a loud rumbling noise when ignition takes longer than normal. The resulting gas buildup may fracture your furnace’s heat exchanger, where natural gas transforms into warmth. Any fractures in it can discharge carbon monoxide, which is regularly vented outside. This toxic gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, GV Heating & Air advises turning it off and reaching us at 763-535-2000. Excessive natural gas in your furnace or a broken heat exchanger are serious issues that require immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide heated air throughout your house. If the ductwork wasn’t installed correctly or is getting dated, it can be loud when your furnace is on. This could be the case if your furnace makes a banging noise when it shuts off. Get in touch with GV Heating & Air at 763-535-2000 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you observe your furnace making a buzzing noise, don’t delay calling us. A buzzing sound frequently means there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to run 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 moves heated or cold air around your home, and a capacitor, which triggers the motor. If either of these pieces are going out, they will buzz when the furnace switches on.

3. Furnace Rattles

If your furnace is making a rattling noise, it can be the result of something small, like a loose screw, or something serious, like a broken component. In either case, we urge you to shut your furnace off and contacting our heating pros at 763-535-2000 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s making an effort to tell you it could use some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn out or a bearing may need to be greased. We realize that maintenance often slips your mind, but our techs can get your furnace operating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You might also hear whistling while the furnace is on if a floor vent is loose. If you’ve checked your vents but are still sensing whistling, GV Heating & Air can provide support. It’s critical to get loose ductwork repaired fast, since it can result in comfort problems in your home and inflate your utility expenses.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you detect your furnace making a grinding noise. This metal-on-metal racket typically means there’s an issue with your furnace’s blower. Turn off your furnace off immediately and contact us at 763-535-2000 for support.

When you’re hearing a weird noise from your furnace, GV Heating & Air is ready to help. Contact us at 763-535-2000 to request your furnace repair appointment right away.