A noisy boiler can be a real headache. If it’s happening in your home or business, you’re definitely wondering what’s causing it and how to fix it. At Doornbos Heating & Air Conditioning, we’ve been helping the Chicagoland area keep their heating systems running smoothly since 1927. Let’s dive into the most common reasons your boiler is making noise and what you can do to solve the issue.
Common Boiler Noises and What They Mean
Boilers can make a variety of noises, and each sound can point to a different issue. Here are some of the most common sounds and what they might mean:
Banging Noises
If your boiler is making loud banging noises, it could be caused by a buildup of limescale, damaged pump, cracked heat exchanger, or even thermostat issues. This problem, often called “kettling,” happens when water can’t flow freely through the heat exchanger. The trapped water boils and turns to steam, creating pressure that may cause banging sounds or even whistling.
Gurgling Noises
Gurgling usually means there’s air trapped in the system or a problem with water circulation. It might also indicate that the water pressure is too low.
Humming or Vibrating
Low pitched humming is common when the boiler is working properly, but if the hum seems excessive or if you notice vibrating, the problem could be with the pump. Call Doornbos today to schedule a boiler service repair call.
Why Is My Boiler Making Noise?
Now that you know the types of noises, let’s break down the reasons behind them:
Limescale or Sludge Buildup
Over time, minerals in hard water can form limescale, especially in the heat exchanger. This restricts water flow and causes overheating, which leads to kettling or banging noises. Sludge buildup from rust and debris can also cause similar problems.
Trapped Air in the System
Air bubbles in the pipes or radiators can lead to gurgling or whistling sounds. This usually happens after a new boiler installation or maintenance that wasn’t properly bled.
Low Water Pressure
If your boiler pressure drops too low, it can make strange noises, especially gurgling or banging. Low pressure can prevent water from circulating correctly, which causes the system to work harder than it should.
Loose or Worn-Out Components
Over time, the vibration of your boiler can loosen screws, pipe brackets, or other components. This can cause humming or rattling noises.
Solutions for a Boiler Making Noise
While some boiler noises can be fixed with a little troubleshooting, boilers are intricate heating sources, it’s best to call the professionals at Doornbos Heating & Air Conditioning for quick and complete solutions. However, there are two solutions you may feel comfortable tackling:
Bleed Your Radiators
If trapped air is the issue, bleeding your radiators can often solve the problem. This simple task releases the air and allows water to flow smoothly again.
Check the Water Pressure
Look at your boiler’s pressure gauge. If it’s too low, you may need to add water to the system. Refer to your boiler manual or contact a professional to safely adjust the pressure.
Otherwise the best option for handling a noisy boiler is to schedule a diagnostic heating call with Doornbos Heating & Air Conditioning. Our trained technicians can inspect your boiler, and:
- Clean the System – A build up of limescale or sludge typically requires a chemical flush or descaling to clean out the system and improve water flow.
- Tighten Loose Parts – Loose parts, screws, or brackets can cause your boiler to be noisy. Our technicians will ensure everything is connected securely and safely.
There are always scenarios that call for professional help. Let’s explore a few of them now.
When to Call a Professional
While some minor issues can be handled on your own, it’s best to call a professional for persistent or serious boiler noises. At Doornbos Heating & Air Conditioning, we’ve been diagnosing and repairing boilers for nearly a century. Here are a few signs you need expert help:
- Continuous or worsening noises despite trying basic fixes.
- Leaking water or noticeable damage to the boiler.
- Error codes or warning lights on your boiler display.
- Inconsistent heating or hot water supply.
Preventing Boiler Noise in the Future
The best way to avoid boiler issues is with regular maintenance. Annual inspections by trusted HVAC professionals like Doornbos can catch small problems before they turn into big ones. Our team is here to help keep your system running quietly and efficiently all year long.
Trust Doornbos for Your Boiler Needs
If your boiler is making noise, don’t wait for it to get worse. At Doornbos Heating & Air Conditioning, we’re proud to serve the South suburbs and greater Chicagoland with honest, top-quality service. Whether you need a repair, maintenance, or a replacement, our team is here to help.
Contact Doornbos today to schedule your appointment and enjoy a quieter, more comfortable home or business!
