Patching an Old HVAC System
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Patching an Old HVAC System

When I married my husband ten years ago, I reluctantly agreed to move into the older brick home he already owned. I knew the house was outdated. Unfortunately, I didn’t have any experience renovating an older place. Immediately, I noticed the old central air conditioning unit in the home. After thoroughly inspecting the equipment, I was afraid the ancient unit wouldn’t make it through my first summer in my new place. Thankfully, I was wrong. After ten years, this same air conditioning system is still running smoothly. However, it has received some diligent care from a reputable HVAC contractor over the years. On this blog, you will discover the ways an HVAC contractor can restore an older air conditioning unit.


Patching an Old HVAC System

Is Your Boiler Banging? The Causes Of Common Boiler Problems

Mary Gonzalez

If your boiler is banging, then you've probably got a problem brewing. Noises from a boiler can signal a number of potential issues, from the simple and cheap to the complex and expensive. While boiler problems usually require expert help to diagnose and fix, you can get a jumpstart on the problem by identifying the most likely cause for your boiler's unusual problems. This can also help you to get a rough idea of how much the problem should cost to fix so that you can better evaluate the estimates that you are provided with.

Read on to discover a few common noises that ailing boilers make and what they might mean. Remember, if you are concerned about your boiler the safest thing to do is have a professional come and perform a full inspection.

Boom! Bang!

No one likes to hear loud and sudden bangs from their boiler. Often these sounds are heard shortly after the boiler fires up, and they can be extremely worrying. Although the noise may seem to originate from the boiler, it may also be coming from the hot water pipes that attach to the boiler. Often, bangs and knocks indicate air that has managed to enter the system. If possible, try to stay near the boiler when the noises are most common and carefully listen for their source. If the pipes seem to be the culprit, then you can temporarily solve the problem by bleeding air from your system. Note that air shouldn't be entering your system at all, so it will still be necessary to have a professional find the true cause of the problem.

Unfortunately, a loud bang or pop from the boiler itself can potentially indicate a problem with the gas ignition system. This isn't something that you can diagnose or fix yourself, so if bleeding doesn't seem to help the problem it is definitely time to call a professional.

Is Someone Making Tea?

Is your boiler making a gurgling noise or sound that reminds you of a teapot? This is a common enough symptom that it has its own name: kettling. If your boiler is kettling, there are several possible issues that may be to blame. The sound itself is the result of water in the boiler becoming too hot and beginning to boil, just like a teapot. Boilers have a large number of safety features so it is unlikely that kettling represents any imminent danger, but it does indicate that your boiler is not operating correctly and so should be inspected soon.

While the immediate cause of boiling is water that has become too hot, the deeper issue is usually a mineral buildup inside the boiler that is restricting water flow through the heat exchanger. This is a fairly serious problem that will negatively impact the boiler's ability to heat as well as its lifespan.


We've established that your boiler can bang or even sound like a kettle, but it can also make more mechanical sounds. A buzzing, humming, or strong vibration likely indicates a problem with a worn part inside the boiler.  This may also be something as simple as a loose compartment or boiler that simply isn't secure enough. As a first step, you can try tightening up any easily accessible access panels on the unit itself.

If this doesn't work, then the problem may be a failed bearing or other issue with the pump itself. In many cases, boiler pumps have user-accessible controls for adjusting the speed. To determine if the pump is the source of the problem, you can try adjusting the speed lower and listening for a change in the noise. If this isn't enough to solve your problem, then it's once again time to call on the help of a boiler repair professional.