When your furnace is working correctly, it should give warmth without creating too much sound. While it’s expected to notice your furnace making noise as it starts up, other sounds are indicating your furnace should get immediate professional assistance.

Here are some of the most frequent furnace noises and what they might mean. If your furnace is making an atypical noise, our friendly heating specialists are here to assist with the best furnace repair in Mission Viejo, California.

1. Furnace Makes Banging or Knocking Sounds

You might have an urgent problem on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it can mean there could be several problems. These involve gas building up 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 important to schedule annual furnace maintenance with 1st Choice Heating & Air Conditioning. One of the tasks our professionals perform during this service is clean your furnace’s burners. When this part gets dirty, you might hear your furnace making a loud rumbling noise when ignition takes more time. The resulting gas buildup may break your furnace’s heat exchanger, where natural gas changes into warm air. Any cracks in it can leak carbon monoxide, which is ordinarily emitted outdoors. This toxic gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, 1st Choice Heating & Air Conditioning urges you to turn it off and contacting us at 949-204-0859. Excessive natural gas in your furnace or a ruptured heat exchanger are hazardous issues that should get prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide heated air throughout your residence. If the ductwork wasn’t designed properly or is getting dated, it can be loud when your furnace is heating. This might be the problem if your furnace makes a banging noise when it shuts off. Get in touch with 1st Choice Heating & Air Conditioning at 949-204-0859 and we’ll determine the problem.

2. Furnace Buzzes Constantly

If you notice your furnace making a buzzing noise, don’t wait to call us. A buzzing sound frequently means there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to work on the right voltage. If wires or the box needs to be tightened, you could detect a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends hot or chilly air around your house, and a capacitor, which starts the motor. If either of these components are fading, they will buzz when the furnace turns on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it could be due to something small, like an unfastened screw, or something serious, like a broken component. In either case, we advise shutting your furnace off and contacting our heating specialists at 949-204-0859 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 making an effort to alert you it needs some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn out or a bearing may need to be greased. We are aware that maintenance sometimes slips your mind, but our technicians 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 likely because of an air leak in your ductwork. You may also be aware of whistling while the furnace is on if a floor vent is loose. If you’ve examined your vents but are still noticing noise, 1st Choice Heating & Air Conditioning can provide support. It’s essential to get loose ductwork repaired without delay, because it can result in comfort troubles in your residence and inflate your utility costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound often means there’s an issue with your furnace’s blower. Turn off your furnace off promptly and contact us at 949-204-0859 for support.

When you’re getting a strange noise from your furnace, 1st Choice Heating & Air Conditioning is available to support you. Contact us at 949-204-0859 to schedule your furnace repair appointment now.