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

October 13, 2020

When your furnace is operating properly, it should give heat without generating too much sound. While it’s normal to catch your furnace making noise as it starts up, other noises are indicating your furnace should get immediate professional assistance.

Here are some of the most common furnace noises and what they can mean. If your furnace is making a weird noise, our friendly heating professionals are here to assist with the best furnace repair in Hamilton, OH.

1. Furnace Making a Banging Noise

You might have an urgent situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can signal there could be a few problems. These involve gas increasing in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over the years, so that’s why it’s critical to set annual furnace maintenance with Carefree Heating and Cooling, LLC. One of the jobs our pros do during this service is clean your furnace’s burners. When this piece gets dirty, you could hear your furnace making a loud rumbling noise after ignition takes longer than normal. The following gas buildup may crack your furnace’s heat exchanger, where natural gas transforms into warm air. Any fractures in it can discharge carbon monoxide, which is regularly released away from your home. This toxic gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Carefree Heating and Cooling, LLC recommends turning it off and reaching us at 513-268-5164. Too much natural gas in your furnace or a ruptured heat exchanger are hazardous troubles that should get immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver heated air across your house. If the ductwork wasn’t installed properly or is getting dated, it can be loud when your furnace runs. This can be the issue if your furnace makes a banging noise when it shuts off. Call Carefree Heating and Cooling, LLC at 513-268-5164 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound often indicates an electrical issue, 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 is loose, you might detect a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends warm or chilly air throughout your rooms, and a capacitor, which turns on the motor. If either of these components are going out, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be related to something minor, like an unsecure screw, or something serious, like a broken piece. In either case, we urge you to shut your furnace off and contacting our heating specialists at 513-268-5164 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to tell you it needs some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn out or a bearing might need to be lubricated. We know that maintenance frequently slips your mind, but our pros 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 likely due to an air leak in your ductwork. You may also notice whistling while the furnace is on if a floor vent isn’t tight. If you’ve checked your vents but are still sensing noise, Carefree Heating and Cooling, LLC can assist you. It’s essential to get loose ductwork fixed quickly, as it can create comfort issues in your residence and drive up your gas costs.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal noise frequently means there’s trouble with your furnace’s blower. Shut down your furnace off now and call our pros at 513-268-5164 for support.

When you’re noticing an atypical noise from your furnace, Carefree Heating and Cooling, LLC is available to provide assistance. Contact us at 513-268-5164 to book your furnace repair appointment today.