A new furnace in Avon, IN normally makes soft clicks, a brief whoosh when the burners light, and a steady hum from the blower and inducer motor. Loud bangs, squealing, rattling, grinding, or repeated clicking without heat are not normal and should be checked by a technician, especially while the installation is still new.
Avon sits in eastern Hendricks County and has grown quickly since its incorporation in 1995, so plenty of homeowners are trading older furnaces for higher efficiency equipment that sounds different from the old unit. Our team handling furnace repair in Avon helps homeowners sort out which sounds come with a modern furnace and which point to a problem.
Key Takeaways
- A new furnace in Avon, IN normally makes soft clicks, a short whoosh at ignition, and a steady blower hum.
- Trane, a major furnace manufacturer, states that a furnace should not make any loud noises during operation.
- Banging at startup often points to delayed ignition, which needs a professional diagnosis.
- Rattling, squealing, and grinding from a new furnace usually signal loose parts, installation issues, or motor problems.
- New high efficiency furnaces often sound different from older models because of inducer motors, variable speed blowers, and condensate drainage.
Why Does a New Furnace Sound Different?
A new furnace often sounds different because modern equipment uses components that older furnaces did not have. Homeowners who lived with a 20 year old furnace are used to a different set of sounds, so normal operation on a new system can seem unusual at first.
An inducer motor is a small fan that pulls combustion gases through the furnace and out the vent before the burners light, and it creates a soft hum at the start of each cycle. Many new furnaces also use variable speed blowers, which ramp up gradually and may run longer at lower speeds. High efficiency condensing furnaces produce water as part of normal operation, so a faint gurgle or trickle from the condensate drain is common.
Normal Sounds From a New Furnace
Normal furnace sounds are quiet, brief, and consistent from one cycle to the next. According to Trane’s guide to HVAC sounds, a furnace should not make odd noises beyond humming or normal startup and shutdown sounds.
These sounds are typically part of normal operation in a new furnace:
- Soft clicks: The thermostat, control board, and gas valve click as each cycle begins and ends.
- A short whoosh: The burners make a brief rush of sound when the gas ignites.
- Steady humming: The inducer motor and blower create a low, even hum while running.
- Light ticking: Ductwork expands slightly as warm air moves through it.
- Gurgling from the drain: Condensing furnaces move water through the condensate line.
A faint burning smell during the first few uses is also common, because manufacturing oils and dust burn off the new heat exchanger. The smell should fade after the first few heating cycles.
Sounds That Mean Your New Furnace Needs Service
Sounds that are loud, sudden, metallic, or getting worse mean the furnace needs service. A new furnace should run quietly, so a noise that stands out is worth taking seriously even if heat is still reaching the rooms.
This table explains common problem sounds and what they usually point to:
| Sound | What It Often Means | Recommended Step |
| Loud bang or boom at startup | Delayed ignition, where gas builds up before lighting | Turn the furnace off and call a technician |
| Rattling | Loose panels, screws, or ductwork connections | Schedule an inspection |
| Squealing or screeching | Blower motor or bearing problem | Schedule service soon |
| Grinding or scraping | A part rubbing inside the blower or motor | Turn the furnace off and call a technician |
| Repeated clicking with no heat | An ignition or flame sensing problem | Schedule service |
| Loud whistling | Restricted airflow or undersized ductwork | Have airflow and ducts checked |
Delayed ignition deserves extra caution. Carrier, another major furnace manufacturer, notes that a bang or boom when starting suggests a clogged burner delaying ignition and that the issue requires professional diagnosis.
When Installation Is the Source of the Noise
Installation is often the source of noise in a new furnace, because the new equipment has to match the home’s existing ductwork, venting, and return air. A furnace that is mismatched with the ductwork can work correctly and still sound loud.
In our service calls throughout Avon, the most common installation related noises come from airflow. Newer, more powerful blowers can push air through older ducts faster than they were designed to handle, which creates whistling at registers, booming as ducts flex, or rattling at loose joints. Undersized return air openings can cause the same problems. Professional ductwork repair can correct leaks, loose connections, and restrictions that turn a quiet furnace into a noisy one.
What to Do if Your New Furnace Is Noisy
If your new furnace is noisy, start by noting when the sound happens, how long it lasts, and where it seems to come from. That detail helps a technician diagnose the problem quickly.
Follow these steps when a new furnace starts making a concerning noise:
- Note the timing: Record whether the sound happens at startup, during the cycle, or at shutdown.
- Check the basics: Confirm the filter is clean and the furnace door panel is secure.
- Shut it down for loud noises: Turn the furnace off at the thermostat if you hear banging, grinding, or anything that sounds like metal on metal.
- Contact your installer: A new furnace may still be covered by an installation or manufacturer warranty, so call the company that installed it first.
- Leave the repair to a professional: Avoid opening the furnace cabinet or adjusting internal parts.
If you smell gas at any point, leave the home and call your gas utility from outside.
Why Noise Problems Are Common in Growing Communities Like Avon
Noise problems are common in growing communities like Avon because so many homes are getting equipment upgrades at the same time. Avon’s population grew from 12,446 in 2010 to 21,474 in 2020, according to U.S. Census figures, and homes built during earlier growth periods are now reaching the age for furnace replacement.
Working in homes from neighborhoods along the US 36 and Rockville Road corridor to subdivisions near Ronald Reagan Parkway, we often see original ductwork paired with brand new furnaces. A proper furnace installation accounts for duct size, return air, and venting so the new system runs quietly from day one. For homeowners comparing equipment and service options, our heating services cover installation, repair, and maintenance.
Frequently Asked Questions About New Furnace Noise in Avon
Is it normal for a new furnace to be louder than the old one?
A new furnace can sound different from an old one, but it should not be noticeably louder in a disruptive way. Many new furnaces run longer at lower speeds, which changes the sound without making it louder.
Why does my new furnace click when it turns on?
A few soft clicks at startup are normal and come from the thermostat, control board, and gas valve. Repeated clicking without the burners lighting points to an ignition problem that needs service.
Can a new furnace be too big for my home?
Yes, a furnace can be oversized for a home, and an oversized furnace often runs short, loud cycles. Proper sizing is based on a load calculation that accounts for the home’s insulation, windows, and layout, not just square footage.
Should a new furnace make a whooshing sound?
A short whoosh when the burners ignite is normal. A loud whoosh from the vents usually points to high air velocity, which a technician can check by measuring airflow and duct size.
Will a noisy new furnace be covered under warranty?
Coverage depends on the cause of the noise and the terms of your installation and manufacturer warranties. Contacting the installer promptly and keeping your paperwork handy makes the process easier.
Keeping Your New Avon Furnace Running Quietly
A new furnace in Avon should make only soft clicks, a brief whoosh at ignition, and a steady hum, while bangs, rattles, squeals, and grinding call for a professional inspection. Catching a noise early often means a simple adjustment instead of a bigger repair.
Complete Comfort Heating, A/C & Plumbing Repair helps Avon homeowners get quiet, dependable performance from their heating systems, with expertly skilled technicians who do the job right the first time. If your new furnace is making a sound you are not sure about, book an HVAC inspection and let our team take a listen.