When your furnace is running correctly, it should deliver warm air without creating too much sound. While it’s expected to hear your furnace making noise as it turns on, other sounds are indicating your furnace needs immediate professional support.

Here are some of the most common furnace noises and what they might be indicating. If your furnace is making a strange noise, our friendly heating specialists are here to assist with the best furnace repair in Payson, Arizona.

1. Furnace Makes Banging or Knocking Sounds

You could have a serious situation 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 several problems. These range from gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy over the years, so that’s why it’s critical to set seasonal furnace maintenance with North Mechanical Heating and Cooling. One of the jobs our techs complete during this service is clean your furnace’s burners. When this piece gets grimy, you may hear your furnace making a loud rumbling noise after ignition takes more time. The subsequent gas buildup can break your furnace’s heat exchanger, where natural gas turns into warm air. Any breaks in it can discharge carbon monoxide, which is normally emitted away from your home. This hazardous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, North Mechanical Heating and Cooling urges you to turn it off and contacting us at 928-263-8570. Too much natural gas in your furnace or a ruptured heat exchanger are dangerous issues that should get prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move heated air around your residence. If the ductwork wasn’t installed correctly or is getting dated, it can be noisy when your furnace runs. This can be the problem if your furnace makes a banging noise when it shuts off. Contact North Mechanical Heating and Cooling at 928-263-8570 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace uses an internal transformer to run on the proper voltage. If wires or the box needs to be tightened, you might notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves hot or cold air throughout your space, and a capacitor, which starts the motor. If either of these pieces are fading, they will buzz when the furnace starts.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it may be the result of something little, like a loose screw, or something major, like a broken part. In either case, we recommend shutting off your furnace and contacting our heating specialists at 928-263-8570 for help.

4. Furnace Is Making a High-Pitched Squealing Sound

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

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You could also notice whistling while the furnace is running if a floor vent is loose. If you’ve checked your vents but are still hearing noise, North Mechanical Heating and Cooling can assist you. It’s important to get loose ductwork repaired quickly, as it can result in comfort troubles in your house and increase your heating bills.

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 usually means there’s trouble with your furnace’s blower. Turn off your furnace off immediately and contact us at 928-263-8570 for help.

When you’re hearing a weird noise from your furnace, North Mechanical Heating and Cooling is available to provide assistance. Contact us at 928-263-8570 to request your furnace repair appointment today.