When your furnace is working correctly, it should provide warm air without generating too much sound. While it’s normal to catch your furnace making noise as it starts up, other disruptions are signaling your furnace should get immediate professional assistance.

Here are some of the most common furnace noises and what they might mean. If your furnace is making an atypical noise, our friendly heating pros are here to help with the best furnace repair in Jefferson City, Missouri.

1. Furnace Makes Banging or Knocking Sounds

You might have an urgent problem 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 couple of problems. These include gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy over the years, so that’s why it’s important to set seasonal furnace maintenance with Stieferman Heating Company Inc. One of the things our technicians perform during this service is clean your furnace’s burners. When this component gets grimy, you may hear your furnace making a loud rumbling noise after ignition takes more time. The resulting gas buildup might break your furnace’s heat exchanger, where natural gas changes into warmth. Any cracks in it can discharge carbon monoxide, which is ordinarily vented away from your home. This dangerous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Stieferman Heating Company Inc advises turning it off and contacting us at 573-635-3547. Too much natural gas in your furnace or a broken heat exchanger are hazardous troubles that should get immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move warm air around your residence. If the ductwork wasn’t put in properly or is aging, it can be noisy when your furnace is on. This may be the problem if your furnace makes a banging noise when it shuts off. Get in touch with Stieferman Heating Company Inc at 573-635-3547 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

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

Your furnace uses an internal transformer to work on the right voltage. If wires or the box isn’t tight enough, you could hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves heated or cooled air around your residence, and a capacitor, which turns on the motor. If either of these pieces are going out, 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 an unfastened screw, or something major, like a broken component. In either case, we advise shutting your furnace off and contacting our heating pros at 573-635-3547 for help.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to tell you it could use some TLC. If you’ve skipped furnace maintenance recently, belts could be worn down or a bearing could need to be lubed. We know that maintenance frequently slips your mind, but our techs can get your furnace operating quietly again quickly.

5. Furnace Whistles

When you’re hearing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You might also notice whistling while the furnace is working if a floor vent isn’t tight. If you’ve looked at your vents but are still noticing sound, Stieferman Heating Company Inc can provide support. It’s important to get loose ductwork repaired fast, as it can create comfort problems in your residence and increase your utility costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a good 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. Shut down your furnace off now and reach us at 573-635-3547 for support.

When you’re hearing an uncommon noise from your furnace, Stieferman Heating Company Inc is ready to support you. Contact us at 573-635-3547 to request your furnace repair appointment right away.