When your furnace is working correctly, it should deliver heat without making too much noise. While it’s expected to catch your furnace making noise as it turns on, other sounds are showing your furnace needs immediate professional support.

Here are some of the most reported furnace noises and what they might mean. If your furnace is making a strange noise, our friendly heating pros are here to assist with the best furnace repair in Corpus Christi, Texas.

1. Furnace Makes Banging or Knocking Sounds

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 may mean there could be several problems. These range from gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes grimy as time passes, so that’s why it’s essential to set yearly furnace maintenance with Total Assurance AC & Heating. One of the tasks our techs perform during this service is clean your furnace’s burners. When this part gets grubby, you could hear your furnace making a loud rumbling noise if ignition takes longer than normal. The ensuing gas buildup may break your furnace’s heat exchanger, where natural gas turns into warmth. Any breaks in it can leak carbon monoxide, which is ordinarily released outside. This dangerous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Total Assurance AC & Heating urges you to turn it off and calling us at 361-217-7080. Too much natural gas in your furnace or a cracked heat exchanger are hazardous troubles that necessitate prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move hot air across your house. If the ductwork wasn’t put in correctly or is getting old, it can be noisy when your furnace runs. This might be the issue if your furnace makes a banging noise when it shuts off. Contact Total Assurance AC & Heating at 361-217-7080 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

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

Your furnace uses an internal transformer to work on the correct voltage. If wires or the box isn’t tight enough, you may detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes hot or cold air across your house, and a capacitor, which triggers the motor. If either of these pieces 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 may be the result of something minor, like an unfastened screw, or something serious, like a broken part. In either case, we urge you to shut your furnace off and contacting our heating specialists at 361-217-7080 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s making an effort to tell you it requires some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn out or a bearing could need to be lubricated. We are aware that maintenance sometimes slips your mind, but our technicians can get your furnace running quietly again fast.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You could also hear whistling while the furnace is operating if a floor vent is loose. If you’ve checked your vents but are still sensing sound, Total Assurance AC & Heating can provide support. It’s important to get loose ductwork taken care of without delay, as it can create comfort problems in your residence and drive up your energy expenses.

6. Furnace Makes Noise that Sounds Like Scraping Metal

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. Switch off your furnace off right away and call us at 361-217-7080 for help.

When you’re getting an atypical noise from your furnace, Total Assurance AC & Heating is here to provide assistance. Contact us at 361-217-7080 to schedule your furnace repair appointment right away.