Remember, while furnaces make some noise while operating, they should never be extremely loud. In any case, if you are not familiar or comfortable with diagnosing furnace issues, don't hesitate to request an appointment with your local One Hour Heating & Air Conditioning professionals.
Normal Furnace Noises
Sometimes there is a little bit of a pop or click as the furnace fires up, then the heating system settles into a dull hum as it runs. Think of it like the click you hear when you turn on the burner on a gas stove.
On a normal day, your home's furnace might make a little noise as it starts up, when it's turning on, and then when it turns off. You can always expect to hear some noise from the furnace. The thing about this noise is that it should never be disruptive.
If you're hearing a loud banging or booming noise, this could indicate your furnace has dirty burners. This is hazardous as it can hinder the ignition. This delay in ignition triggers a gas build-up, producing a little explosion when it finally does light. Your burners should be regularly cleaned to avoid this issue.
7. Grinding, Scraping, or Clanking. If your furnace sounds like a train grinding and scraping away on tracks, then you probably have an issue with the blower wheel.
Yes, your gas furnace can sound like a jet plane when it's heating your home, but is that a bad thing? It could be a sign your heating system needs some serious maintenance. Furnaces can be loud, but if your furnace sounds like it's taking off from a runway, here are some helpful tips for your furnace troubleshooting.
A low rumble is a normal sound when your gas or oil-fired furnace kicks on. However, if that rumble is louder than usual—or lasts longer than usual—this could indicate a very serious problem with your burner.
The most likely reason why your new furnace is noisier than your old furnace is because your new furnace is more efficient than your old furnace. The sound that you are hearing could simply be more airflow.
If your furnace produces a loud humming or buzzing sound, there could be an issue with the motor. There may also be something wrong with the fan. It can be something as simple as a loose screw, loose door, or improperly installed furnace filter.
If the usual noise volume increases, or you start to hear flapping, rattling or high-pitched sounds from the supply vents, return grilles or ceiling diffusers, it's likely due to an increase in pressure caused by airflow restrictions somewhere in the HVAC system.
Pilot flame color changes
A yellow flame is a clear sign that the gas is not burning properly. Dirty or partially blocked systems can produce this. It's also another sign that a call to your trusted HVAC contractor is needed to save money and keep you a bit safer.
For the most part, an HVAC system will be very quiet background noise that's easy to ignore. An HVAC system usually won't run loudly unless there's a problem. Your HVAC system, if there's a problem, may make several different noises. You may hear a buzzing noise, a popping sound, or even clanking.
Blocked or undersized air ducts, closed vents, or a clogged air filter can force the furnace to work harder, leading to a loud noise similar to a jet engine. Solution: Inspect and clean or replace air filters and ensure all vents are open and unobstructed.
Modern furnace systems operate quietly. They have two- or multi-stage motors, which don't make as much noise when they start and stop. Modern furnace systems also feature sound dampening equipment. You'll barely hear a hum when your new furnace performs a heating cycle.
The most important noise you'll hear from an air conditioner that indicates it's performing its job as normal is when the compressor in the condenser cabinet starts to hum. This signals the start of the air conditioner's cooling cycle.
While all furnaces generate some ambient noise, they run quiet enough not to be disruptive most of the time. However, loud buzzing or humming can indicate various mechanical or electrical problems, either when the furnace starts up or throughout its operation.
If the sound is louder than typical and lasts longer than normal, it can be a sign of a problem with dirty burners, high gas pressure, or a malfunctioning heat exchanger, all of which could compromise the equipment's functionality and safety.
The Average Furnace Lifespan
A well-maintained furnace can last at least 15 to 20 years, but completing annual maintenance and being diligent with repairs can extend its life even longer.
A majority of furnaces will produce a low humming noise while they are operating. If this noise is becoming noticeably loud, this is a signal of a severe problem with your blower fan or capacitor. To prevent damage to your fan, it's important to call a licensed technician to inspect and repair the blower motor.
All-in-all, your air conditioning unit may be buzzing due to loose parts. Some components that can become detached and loose include fan blades, refrigerant piping, and other internal parts. In some cases, the loose part can be adjusted and tightened to fix the problem.
In order to maintain a comfortable home environment and reduce energy consumption, it's important to ensure your HVAC system is running at an optimal noise level. Ideally any appliance or HVAC system should never create sound louder than 60 dB inside your home.
Loud Bangs, Rumbles, Knocks, or Booms
Loud noises like this are a sign of a build of gas in a furnace. The noise you hear can mean your heat exchanger is at risk of cracking. Even worse, it's a sign that something dangerous could happen if you continue to use your heater.