It’s normal for boilers to make some quiet sounds while they run, but loud, sudden, or new sounds are a problem. If your equipment is suddenly making a different noise, something has changed inside the appliance and you likely need boiler repairs. Here are some of the most common sounds you should be aware of and what they mean.

When to Call for Boiler Repairs

1. Whistling

A boiler can produce a high-pitched whistle or whine, similar to a boiling kettle's sound. This whistle comes from a high volume of steam escaping from a small hole, meaning your boiler has sprung a leak. You may also notice a whining sound if a fan is scraping against another nearby part or the unit's fuel line is kinked. Check the exposed area of the fuel line yourself; if straightening it doesn't stop the sound, you'll need professional boiler repairs.

2. Banging & Rumbling

This sound occurs when lots of mineral buildup and sediment are trapped inside your boiler, blocking the heat exchanger. Because the water can't move freely, parts of it heat faster than others, and some may even boil. You may also hear a bang when the wrong amount of fuel enters the chamber to be burned. Both of these conditions are not only inefficient, but they're dangerous and damaging to the unit, so shut down the boiler immediately until it's fixed.

3. Grinding

The motor of your boiler contains ball bearings that allow it to move freely. When they're damaged, worn down, or not lubricated, they make grinding noises and create friction that can damage the unit. They need to be either lubricated or replaced, which means a boiler repair professional must take apart the unit to access them.

For 24/7 emergency boiler repairs, call Thomaston Oil & Propane in Litchfield County. Serving all of Connecticut since 1986, they offer the area’s most reliable heating oil and propane delivery, as well as boiler installation and maintenance. Call (860) 283-4878 or visit their website to learn about their service plans and discounts.