When your furnace is working properly, it should give heat without creating too much sound. While it’s normal to catch your furnace making noise as it starts up, other noises are signaling your furnace requires immediate professional assistance.
Here are some of the most reported furnace noises and what they might be signaling. If your furnace is making a strange noise, our friendly heating pros are here to assist with the best furnace repair in Northglenn, Colorado.
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 indicate there could be several problems. These range from gas building up in your furnace or a ductwork situation.
Banging Sounds Coming from Your Furnace
Your heating system gets grimy as time passes, so that’s why it’s important to book routine furnace maintenance with Northglenn Heating & Air Conditioning. One of the things our pros perform during this work is clean your furnace’s burners. When this part gets grubby, you could hear your furnace making a loud rumbling noise after ignition is delayed. The subsequent gas buildup can crack your furnace’s heat exchanger, where natural gas turns into heat. Any breaks in it can leak carbon monoxide, which is regularly released away from your home. This hazardous gas can be lethal in large concentrations.
If you’re aware of banging or knocking sounds coming from your furnace, Northglenn Heating & Air Conditioning recommends turning it off and contacting us at 303-452-4146. Excessive natural gas in your furnace or a fractured heat exchanger are dangerous troubles that should get prompt service.
Banging Sounds Coming from Your Ductwork
Your furnace works with ductwork to provide warm air throughout your home. If the ductwork wasn’t designed correctly or is getting old, it can be noisy when your furnace runs. This might be the problem if your furnace makes a banging noise when it shuts off. Call Northglenn Heating & Air Conditioning at 303-452-4146 and we’ll determine the problem.
2. Furnace Making a Buzzing Noise
If you observe your furnace making a buzzing noise, don’t wait to call us. A buzzing sound usually means there’s an electrical situation, like with its transformer, blower motor or capacitor.
Your furnace uses an internal transformer to run on the correct 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 has a blower motor, which moves heated or chilly air throughout your house, and a capacitor, which starts the motor. If either of these components are going out, they will buzz when the furnace turns on.
3. Furnace Rattles
If your furnace is making a rattling noise, it can be related to something little, like an unsecure screw, or something critical, like a broken piece. In either case, we recommend shutting off your furnace and contacting our heating professionals at 303-452-4146 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 attempting to get your attention it could use some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn down or a bearing might need to be lubed. We know that maintenance frequently slips your mind, but our techs can get your furnace operating quietly again fast.
5. Furnace Making a Whistling Noise
When you’re detecting your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You could also be aware of whistling while the furnace is running if a floor vent is loose. If you’ve looked at your vents but are still hearing sound, Northglenn Heating & Air Conditioning can help. It’s important to get loose ductwork repaired without delay, as it can result in comfort problems in your home and drive up your energy costs.
6. Furnace Makes a Loud, Unpleasant Grinding Noise
It’s not a positive sign if you detect your furnace making a grinding noise. This metal-on-metal sound typically means there’s a problem with your furnace’s blower. Shut down your furnace off instantly and reach us at 303-452-4146 for help.
When you’re noticing an atypical noise from your furnace, Northglenn Heating & Air Conditioning is ready to provide assistance. Contact us at 303-452-4146 to book your furnace repair appointment now.