Crucial Reasons That Could Cause a Boiler to Fail A Guide

27 Apr by Will Kruse

Crucial Reasons That Could Cause a Boiler to Fail A Guide

Boilers are an essential part of any home’s heating system. They provide warmth and comfort during the colder months, and when they fail, it can be a major inconvenience. There are many reasons why boilers can fail, and it’s important to understand the common causes to prevent future issues. From age and wear and tear to lack of maintenance and improper installation, any of these factors can cause a boiler to malfunction. In this article, we’ll explore some of the most common reasons why boilers fail and how to avoid them.

1 – Old Age

One of the most common reasons for boiler failure is old age. Like any mechanical device, boilers have a limited lifespan, and over time, their efficiency and reliability can decline. Most boilers have a lifespan of around 15 to 20 years, but this can vary depending on the make and model. If your boiler is approaching or exceeding its expected lifespan, it may be time to consider replacing it with a newer, more efficient model.

2 – Wear and Tear

Boilers are complex machines with many moving parts, and over time, these parts can wear down or become damaged. Common wear and tear issues include corrosion, leaks, and clogs in the pipes and valves. Regular maintenance can help prevent these issues from occurring and catch them early on before they become major problems.

3 – Lack of Maintenance

Regular maintenance is essential for keeping boilers running smoothly and efficiently. Neglecting routine maintenance tasks such as cleaning and inspections can lead to a host of issues, including reduced efficiency, increased energy bills, and even complete system failure. To avoid these problems, it’s important to schedule regular maintenance with a qualified technician.

4 – Improper Installation

Boilers must be installed correctly to work properly and safely. If a boiler is installed improperly, it can lead to a host of issues, including leaks, poor performance, and even dangerous carbon monoxide leaks. To prevent these issues, it’s important to hire a qualified and experienced professional to install your boiler.

5 – Thermostat Malfunction

A malfunctioning thermostat can cause a boiler to turn on and off at the wrong times or not turn on at all, leading to inconsistent heating or no heating at all. Regularly checking and testing the thermostat can help prevent this issue, and replacing a faulty thermostat can restore proper operation.

6 – Mineral Buildup

Over time, mineral buildup can occur inside a boiler’s pipes, reducing efficiency and potentially causing damage to the system. Regular cleaning and flushing of the pipes can help prevent this issue and keep the boiler running smoothly.

7 – Inadequate Water Pressure

Boilers require adequate water pressure to operate properly. Low water pressure can lead to issues such as reduced heat output or even a complete shutdown of the system. Checking and maintaining proper water pressure is important to ensure the boiler is operating efficiently and effectively.

8 – Igniter or Pilot Light Failure

If the igniter or pilot light fails, the boiler will not be able to heat the water and provide heat to the home. This can be caused by a faulty igniter or pilot light, a clogged or dirty burner, or a malfunctioning gas valve. Regular maintenance and cleaning of the system can help prevent these issues from occurring. If the igniter or pilot light does fail, it is important to have it repaired by a professional as soon as possible to avoid further damage to the boiler.


It is important to keep your boiler well-maintained and serviced regularly to avoid sudden breakdowns. Common reasons for boiler failure include low water pressure, faulty thermostats, airlocks, and corrosion. Additionally, issues with the heating system or a lack of regular cleaning can also contribute to a boiler malfunction. Addressing and resolving these potential issues promptly can help extend the lifespan of your boiler and ensure the safety and comfort of your home or business. Remember to always consult a professional if you are experiencing any issues with your boiler to prevent any further damage and ensure the most efficient and cost-effective solution.

If you need boiler maintenance and service, contact L.J. Kruse Co. We are a family-owned and operated plumbing, heating, and cooling company ready to help get your boiler up to standard today!

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