When your furnace is working correctly, it should give warmth without creating too much disruption. While it’s normal to hear your furnace making noise as it begins running, other sounds are indicating your furnace needs immediate professional assistance.

Here are some of the most common furnace noises and what they might mean. If your furnace is making a strange noise, our friendly heating specialists are here to help with the best furnace repair in Sacramento, California.

1. Furnace Making a Banging Noise

You might have a serious problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be a few problems. These include gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy as time passes, so that’s why it’s critical to book routine furnace maintenance with Bishop’s HVAC. One of the tasks our techs perform during this work is clean your furnace’s burners. When this component gets dirty, you may hear your furnace making a loud rumbling noise if ignition takes more time. The ensuing gas buildup might crack your furnace’s heat exchanger, where natural gas changes into heat. Any fractures in it can discharge carbon monoxide, which is regularly emitted outside. This toxic gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Bishop’s HVAC recommends turning it off and calling us at 916-591-6889. Significant natural gas in your furnace or a ruptured heat exchanger are dangerous troubles that should get prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move warm air across your house. If the ductwork wasn’t installed properly or is aging, it can be loud when your furnace runs. This could be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Bishop’s HVAC at 916-591-6889 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

If you hear your furnace making a buzzing noise, don’t delay calling us. A buzzing sound typically is telling you there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to work on the proper voltage. If wires or the box isn’t tight enough, you could notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves hot or chilly air around your space, and a capacitor, which triggers the motor. If either of these components are failing, they will buzz when the furnace starts.

3. Furnace Rattles

If your furnace is making a rattling noise, it can be due to something little, like an unfastened screw, or something critical, like a broken piece. In either case, we urge you to shut your furnace off and contacting our heating professionals at 916-591-6889 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to alert you it requires some TLC. If you’ve forgotten furnace maintenance recently, belts could be worn down or a bearing might need to be lubricated. We realize that maintenance often slips your mind, but our pros can get your furnace operating quietly again rapidly.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You may also be aware of whistling while the furnace is running if a floor vent isn’t tight. If you’ve checked your vents but are still sensing sound, Bishop’s HVAC can help. It’s important to get loose ductwork fixed fast, as it can create comfort issues in your home and increase your heating costs.

6. Furnace Making a Grinding Noise

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal noise often means there’s trouble with your furnace’s blower. Shut down your furnace off right away and contact us at 916-591-6889 for assistance.

When you’re hearing a strange noise from your furnace, Bishop’s HVAC is here to help. Contact us at 916-591-6889 to request your furnace repair appointment now.