When your furnace is running correctly, it should deliver warm air without generating too much sound. While it’s common to catch your furnace making noise as it turns on, other sounds are indicating your furnace needs immediate professional help.
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 professionals are here to assist with the best furnace repair in Marshalltown, Iowa.
1. Furnace Makes a Banging Sound
You might have a serious situation on your hands if you’re noticing 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 involve gas increasing in your furnace or a ductwork issue.
Banging Sounds Coming from Your Furnace
Your heating system gets dirty over the years, so that’s why it’s essential to schedule yearly furnace maintenance with Kapaun & Brown. One of the tasks our technicians complete during this work is clean your furnace’s burners. When this part gets dirty, you might hear your furnace making a loud rumbling noise if ignition is delayed. The resulting gas buildup may crack your furnace’s heat exchanger, where natural gas transforms into warm air. Any fractures in it can leak carbon monoxide, which is regularly released outdoors. This dangerous gas can be fatal in large concentrations.
If you’re noticing banging or knocking sounds coming from your furnace, Kapaun & Brown urges you to turn it off and calling us at 641-812-2028. Too much natural gas in your furnace or a cracked heat exchanger are critical troubles that should get prompt service.
Banging Sounds Coming from Your Ductwork
Your furnace relies on ductwork to move heated air throughout your house. If the ductwork wasn’t designed correctly or is getting dated, it can be loud when your furnace is heating. This may be the problem if your furnace makes a banging noise when it shuts off. Call Kapaun & Brown at 641-812-2028 and we’ll determine the problem.
2. Furnace Makes a Buzzing Sound
If you hear your furnace making a buzzing noise, don’t wait to call us. A buzzing sound frequently means there’s an electrical issue, like with its transformer, blower motor or capacitor.
Your furnace relies on an internal transformer to run on the right voltage. If wires or the box isn’t tight enough, you might notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends 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 may be the result of something small, like an unsecure screw, or something serious, like a broken part. In either case, we advise shutting your furnace off and calling our heating specialists at 641-812-2028 for support.
4. Furnace Squeals
If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s attempting to alert you it needs some TLC. If you’ve neglected furnace maintenance the past few years, belts could be worn down or a bearing could need to be lubed. We know that maintenance sometimes slips your mind, but our professionals can get your furnace running quietly again quickly.
5. Furnace Making a Whistling Noise
When you’re noticing your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You could also notice whistling while the furnace is running if a floor vent isn’t secure. If you’ve looked at your vents but are still noticing whistling, Kapaun & Brown can assist you. It’s critical to get loose ductwork fixed fast, as it can make comfort troubles in your residence and inflate your heating bills.
6. Furnace Makes Noise that Sounds Like Scraping Metal
It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal sound frequently means there’s trouble with your furnace’s blower. Switch off your furnace off instantly and call our pros at 641-812-2028 for assistance.
When you’re hearing a weird noise from your furnace, Kapaun & Brown is available to support you. Contact us at 641-812-2028 to schedule your furnace repair appointment right away.