Banging, Screeching and Rattling: What 6 Typical Furnace Noises Indicate

October 13, 2020

When your furnace is running like it should, it should deliver warm air without making too much disruption. While it’s common to hear your furnace making noise as it starts up, other disruptions 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 specialists are here to fix the problem with the best furnace repair in Auburn.

1. Furnace Making a Banging Noise

You might have a serious issue on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be a few problems. These range from gas increasing in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty as time passes, so that’s why it’s important to schedule annual furnace maintenance with Forster Heating. One of the tasks our techs perform during this work is clean your furnace’s burners. When this part gets grimy, you might hear your furnace making a loud rumbling noise when ignition is delayed. 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 ordinarily released outside. This hazardous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Forster Heating recommends turning it off and contacting us at 530-885-8081. Too much natural gas in your furnace or a cracked heat exchanger are dangerous troubles that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide hot air around your house. If the ductwork wasn’t put in properly or is getting old, it can be noisy when your furnace is heating. This might be the case if your furnace makes a banging noise when it shuts off. Get in touch with Forster Heating at 530-885-8081 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 often is telling you there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace uses 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 has a blower motor, which sends warm or chilly air across your house, and a capacitor, which starts the motor. If either of these pieces are failing, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be the result of something minor, like a loose screw, or something major, like a broken part. In either case, we urge you to shut your furnace off and getting in touch with our heating pros at 530-885-8081 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s making an effort to get your attention it requires some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be dilapidated or a bearing might need to be greased. We know that maintenance often slips your mind, but our technicians 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 frequently the result of an air leak in your ductwork. You could also notice whistling while the furnace is running if a floor vent isn’t tight. If you’ve looked at your vents but are still sensing sound, Forster Heating can assist you. It’s critical to get loose ductwork repaired without delay, because it can result in comfort issues in your home and increase your utility costs.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal racket typically means there’s a problem with your furnace’s blower. Shut down your furnace off instantly and reach our professionals at 530-885-8081 for help.

When you’re getting an atypical noise from your furnace, Forster Heating is available to provide assistance. Contact us at 530-885-8081 to schedule your furnace repair appointment today.