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Why Is My Boiler Leaking?

February 22, 2021

Why Is My Boiler Leaking?

Your boiler can serve you reliably and effectively for many years. Boilers have an average lifespan of 20 years. However, like every other home system, they may experience problems such as leakages. Water leaking boilers require the attention of an experienced technician since they could lead to damages. We recommend regular boiler maintenance in the Greater Toronto Area by our technicians at A-Plus Quality Heating and Cooling to prevent such issues. Below are some of the common causes of leaks in boilers and what to do.

Possible Causes of Boiler Leaks

There are many reasons for leaking boilers, but we will discuss a few of the most common causes. They include the following:


When dirt and debris buildup inside your boiler, it encourages corrosion of pipes and radiators. Over time corrosion weakens your tanks and pipework, which eventually leads to water leaks. If rust and corrosion have not spread further than a valve or a single pipe, then replacing the part can resolve the issue. However, if it has spread across the boiler, you will need to replace the whole system.


High pressure is the most common cause of leaks in boilers. Boilers come with an outlet pipe that lets out excess pressure and prevents the system from imploding. The recommended pressure is between 1 and 2. If you notice the pressure gauge reads more than that, you need to reduce it.


All boilers come with a temperature control valve (TCV) that monitors the water temperatures. The TCV regulates the water temperatures from getting too high. If you notice leaks from the TCV, it’s a sign that the temperatures are too high.

Pump seals

Due to contraction and expansion over time, your boiler pump can develop cracks that cause water leakages. The pump requires either resealing or replacement.

Loose Joints

Your boiler expands and contracts as temperature changes from cold to hot. This change can affect the joints and cause leaks. Through boiler maintenance in the Greater Toronto Area, the joints such as all pipes and tubes connected to the body can get tightened.

Wear and Tear

Like everything else, boilers do not last forever. If your boiler is old, it could experience leakages, and you need to replace it. It also consumes a lot of energy that leads to high monthly bills. A new system will not only save you money but will also offer you efficient heating.

What to Do if a Boiler is Leaking

The cause of leaking boilers can either be simple or complex. Nevertheless, they require immediate inspections from a certified technician from A-Plus Quality HVAC services in the Greater Toronto Area. While you should not attempt to perform repairs on your own, there are a few steps you can take to protect your home.

•  Turn off your homes water supply 

•  Switch off the boiler

•  Wipe any leaked water

•  Finally, contact a qualified technician for boiler repair in the Greater Toronto Area from A-Plus Quality Heating and Cooling.

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    An annual maintenance will extend the lifetime of your heating and cooling unit. The technician will diagnose and repair any problem with the unit before it fails, so you won't need to worry about any problems when the weather gets very hot in the summer or extremely cold in the winter.

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    Just as the name implies, a “mini-split” system is a “split system” however available in smaller capacities, for single room to whole house conditioning. Mini-split systems may range from as small as 9,000 BTUh per hour, comparable to say, a small window AC unit, for individual room use, up to 4 and 5 ton capacities for “Room By Room” (also known as “Zoning”) and whole house conditioning. With near universal design, mini-splits are “heat pumps” which provide both heating and cooling for a home. Here are key advantages when compared to traditional split systems:

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    Variable capacity- Mini-splits are typically DC inverter driven. That is, a variable speed compressor which modulates in proportion to instantaneous demand. Most conventional split systems, by comparison, operate with an ON-OFF strategy. (Would you use an ON-OFF switch as the accelerator in your vehicle?)
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    Modern mini-split systems are remarkably quiet; in fact, many times their operation is unnoticed by the end user.

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  • Why is there ice building up on the copper pipes?

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