When your furnace is operating properly, it should deliver warm air without generating too much noise. While it’s expected to catch your furnace making noise as it turns on, other sounds are indicating your furnace requires immediate professional help.

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 fix the problem with the best furnace repair in Croydon, Pennsylvania.

1. Furnace Makes Banging or Knocking Sounds

You could have a critical issue 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 few problems. These include gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over time, so that’s why it’s important to schedule annual furnace maintenance with Indoor Comfort Systems HVAC. One of the jobs our professionals do during this work is clean your furnace’s burners. When this part gets grimy, you could hear your furnace making a loud rumbling noise if ignition takes longer than normal. The subsequent gas buildup may fracture your furnace’s heat exchanger, where natural gas turns into heat. Any fractures in it can discharge carbon monoxide, which is normally emitted outside. This hazardous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Indoor Comfort Systems HVAC urges you to turn it off and reaching us at 215-741-5505. Significant natural gas in your furnace or a broken heat exchanger are critical troubles that should get fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver heated air throughout your residence. If the ductwork wasn’t installed right or is getting dated, it can be loud when your furnace runs. This may be the case if your furnace makes a banging noise when it shuts off. Get in touch with Indoor Comfort Systems HVAC at 215-741-5505 and we’ll determine the problem.

2. Furnace Buzzes Constantly

If you notice your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound often indicates an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to operate 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 distributes hot or cooled air around your space, and a capacitor, which triggers the motor. If either of these pieces are going out, they will buzz when the furnace turns on.

3. Furnace Rattles

If your furnace is making a rattling noise, it may be related to something minor, like a loose screw, or something serious, like a broken component. In either case, we advise shutting your furnace off and calling our heating professionals at 215-741-5505 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to get your attention it needs some TLC. If you’ve neglected furnace maintenance recently, belts could be worn down or a bearing could need to be lubed. We are aware that maintenance often slips your mind, but our professionals can get your furnace heating quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re hearing your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You may also notice whistling while the furnace is operating if a floor vent is loose. If you’ve looked at your vents but are still sensing noise, Indoor Comfort Systems HVAC can help. It’s important to get loose ductwork repaired quickly, as it can make comfort troubles in your house and inflate 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 sound usually means there’s trouble with your furnace’s blower. Switch off your furnace off instantly and reach us at 215-741-5505 for help.

When you’re hearing an atypical noise from your furnace, Indoor Comfort Systems HVAC is ready to help. Contact us at 215-741-5505 to request your furnace repair appointment now.