Top 5 Boiler Parts That Commonly Fail
Boilers are essential for keeping your home warm and providing hot water, especially during the colder months in Tewkesbury, Gloucestershire. However, like any other mechanical system, boilers can develop issues over time. Regular servicing by experts, like My Home Heating, can help prevent costly breakdowns. In this article, we’ll discuss the top five parts that commonly fail in boilers and why professional boiler servicing is vital to keep your heating system running smoothly.
1. Heat Exchanger
The heat exchanger is the core of your boiler. It transfers heat from the burner to the water, ensuring your radiators and taps are supplied with hot water. Over time, limescale build-up, corrosion, or poor maintenance can cause it to fail.
Symptoms of Failure:
- Leaking water from the boiler.
- Strange noises (e.g., kettling).
- Insufficient heating or hot water.
Prevention:
Annual servicing can identify early signs of limescale or corrosion, saving you from costly repairs or replacements.
2. Circulating Pump
The pump is responsible for moving water around your heating system. If it stops working, your radiators won’t heat up, and you’ll lose the effectiveness of your boiler.
Symptoms of Failure:
- Radiators remain cold even when the boiler is on.
- Odd humming or banging noises.
- The boiler frequently shuts off.
Prevention:
A professional service includes checking and cleaning the pump to ensure it’s working efficiently.

3. Pressure Relief Valve
This safety feature protects your boiler by releasing pressure if it becomes too high. Over time, the valve may fail due to wear and tear or debris blockage, leading to dangerous pressure levels or leaks.
Symptoms of Failure:
- Boiler pressure is too high or too low.
- Leaking water from the pressure relief valve.
Prevention:
During a service, technicians will check the pressure settings and ensure the valve is operating correctly.
4. Ignition System (Electrode or Pilot Light)
Modern boilers use an ignition system to light the burner. Older systems rely on a pilot light. These components can fail due to dirt, wear, or electrical issues.
Symptoms of Failure:
- Boiler fails to ignite.
- Pilot light keeps going out.
- Error codes on the boiler display.
Prevention:
Regular cleaning and inspection during servicing can prevent ignition issues. Technicians can also ensure components like electrodes are replaced before they fail.
5. Thermostat or Control Panel
If your thermostat or control panel malfunctions, it can prevent your boiler from maintaining the correct temperature or switching on altogether.
Symptoms of Failure:
- Boiler doesn’t respond to temperature changes.
- Inconsistent heating or hot water.
- Control panel error messages.
Prevention:
Servicing includes testing the thermostat and control systems to ensure they’re working properly. Upgrading to a smart thermostat can also improve efficiency.
The Importance of Boiler Servicing in Tewkesbury
In Tewkesbury and surrounding areas, regular boiler servicing by My Home Heating ensures your heating system operates safely and efficiently. Annual servicing includes:
- Checking and cleaning internal components.
- Testing safety devices, such as pressure relief valves.
- Detecting potential issues before they escalate into costly repairs.
- Improving energy efficiency, which can lower your energy bills.
Why Choose My Home Heating?
My Home Heating offers professional and reliable boiler servicing for homes in Tewkesbury and Gloucestershire. Their team of Gas Safe-registered engineers is experienced in working with a variety of boiler makes and models.
Services Include:
- Comprehensive boiler inspections.
- Emergency repairs for faulty parts.
- Advice on upgrades and energy-saving solutions.
- Affordable, transparent pricing with no hidden fees.
Book Your Boiler Service Today
Don’t wait until your boiler breaks down. Regular servicing can save you money, keep your home comfortable, and ensure your heating system operates safely. Contact My Home Heating in Tewkesbury today to book your service or get a free quote.
For reliable boiler care in Gloucestershire, trust My Home Heating to keep your system in top condition.