Common Alpha boiler problems

by | May 1, 2024 | Boiler Service

Alpha boilers provide reliable and efficient heating, making them an increasingly popular choice for homeowners.

With regular maintenance, they can provide years of trouble-free service.

However, like any advanced heating system, Alpha boiler problems can develop over time.

Being able to recognise common Alpha boilers problems can help you troubleshoot minor issues and understand when you need to call on help from a professional engineer.

Common Alpha boiler problems

There are a range of common problems that can affect modern boilers and heating systems.

These include:


  • No heating or hot water


A lack of heating or hot water despite the boiler being on is a common Alpha boiler problem. It has a range of potential causes, including a faulty thermostat, airlocks, or issues with the diverter valve.


  • Boiler leaks


If you see water pooling around the boiler, or there are visible signs of water leakage, you may have a leak. This can be caused by damaged seals, corroded pipes, or pressure-related issues.


  • Low boiler pressure


Low boiler pressure will impact the efficiency and effectiveness of your heating system. It can be caused by water leaks, bleeding radiators, or a faulty pressure relief valve.


  • Strange noises


Air in the system, limescale build-up, and malfunctioning components can all create strange gurgling, banging, or whistling noises within your Alpha boiler.


  • Pilot light going out


Issues with the pilot light are some of the most common that can arise with a boiler.

This prevents the boiler from igniting and functioning properly and can be caused by a faulty thermocouple, a blocked pilot light, or problems with the gas supply.


  • Boiler cycling on and off


A boiler that repeatedly turns on and off without reaching the desired temperature can be caused by a faulty thermostat, low water pressure, or a blocked heat exchanger.



  • Frozen condensate pipe


During the winter, condensate pipes that release condensed water vapour from the boiler into the air can freeze. When this happens, the boiler will shut down and will usually display an error code.

Some of these Alpha boilers problems can be quickly remedied by the homeowner, others will need assistance from a qualified heating engineer.

Which Alpha boiler problems can I fix myself?


Several of the most common Alpha boiler problems can usually be safely tackled by the homeowner, such as:


  • No heating or hot water


If your boiler isn’t producing heat or hot water when requested, begin by checking the thermostat settings. Ensure that it’s correctly set to the desired temperature and switched on. It can also be effective to bleed the radiators to release any trapped air which may be impeding the efficiency of your system.


  • Low boiler pressure


If your boiler has low pressure, the problem can usually be rectified by using the boiler’s filling loop. Locate the filling loop and follow the manufacturer’s instructions to increase the pressure of the boiler to the recommended level.


  • Strange noises


Limescale buildup or trapped air in the system can generate unusual sounds within your boiler, such as banging or gurgling. Trapped air can be released by bleeding the radiators, and limescale problems can be addressed by descaling the boiler.


  • Pilot light problems


If the pilot light on your boiler keeps extinguishing it can indicate a blocked or dirty pilot light assembly. Turn off the boiler and allow it to cool, before carefully cleaning the pilot light assembly with a soft brush.


  • Frozen condensate pipe


During cold weather, the condensate pipe of your boiler may freeze.

When this happens, it can cause the boiler to shut down. The pipe can be thawed using warm water or a hot water bottle. Insulating the pipe can prevent future freezing particularly if you live in an area prone to frost.

While all of these issues can be tackled by a homeowner, it’s important to consult a professional engineer if simple measures fail to achieve the desired result.


Which Alpha boiler problems need a heating engineer?


There are a range of issues that should always be addressed by a qualified heating engineer.

If a problem persists after basic troubleshooting, an engineer should be contacted to ensure the problem doesn’t develop into something more serious.

All gas-related issues, such as a faulty gas valve or supply problem, should never be tackled by anyone who isn’t appropriately qualified.

The same applies to electrical faults, including issues with the boiler’s control panel or wiring, as well as major leaks or water damage around the boiler.

Any issues with the boiler’s safety features or sensors will require the immediate attention of a gas heating engineer.

If you encounter any of these, it’s essential to contact a certified heating engineer to diagnose the problem accurately and to carry out the necessary repairs.

Who can replace an Alpha boiler?


An Alpha boiler can only be replaced by a Gas Safe-registered engineer. These professionals have the skills, training, and qualifications to ensure the boiler is replaced correctly and safely.


Alpha boiler warranty


Alpha boilers typically come with manufacturer warranties that cover parts and labour for a specified period. They begin on the day installation is completed and the length of the warranty depends on the model you have fitted.

Combi boilers typically have a warranty between two and seven years, while three to five years is standard for system boilers, and three years for the Alpha range of regular boilers.

It’s essential to register your boiler with Alpha to activate the warranty and ensure your boiler is serviced in line with its requirements.

This will usually be at least once a year.


Alpha boiler installation and maintenance from Bumblebee Plumbing & Heating


Bumblebee Plumbing & Heating is the first choice for boiler installation and maintenance in Warrington, Wigan, and across the North West.

We’re not only highly knowledgeable about heating systems, but also pride ourselves on outstanding customer care.

We’re always happy to answer any questions you may have about Alpha boilers, how they compare to other brands, and what might be the best option for your home.

Why not contact us to find out more about our award-winning new boiler installation service?

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