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5 Most Common Boiler Problems & How To Spot Them

5 Most Common Boiler Problems & How To Spot Them

5 Most Common Boiler Problems & How To Spot Them

What are common problems with boilers not working?


If you notice that your boiler has started to cause you issues and has broken down, it can be a cause for concern, particularly if it has broken down within the winter months. From your radiators not working to no hot water being available, it can be a real concern to your own safety and those that you live with, especially if your boiler has packed in deep into winter.


Therefore, it is important that you get it repaired quickly by a professional boiler repair company. Here at Eric Collier and Son, we are the leading boiler repair and installation company in the South Wales area and have seen our fair share of different boiler problems in households across Wales. 


Throughout this article, we will explore five of the most common problems we typically see across the South Wales area and will provide you with some helpful tips to help you spot these problems. This way you can avoid having to face a complete breakdown of your boiler allowing you to intervene quickly and get an expert out to your home, not only saving you effort and more issuers but also money on repairs too. 


The five biggest causes of boiler breakdown

From boiler leaks to the pilot light going out, there is no boiler problem that we haven’t come across before. From being in the industry since 1971, it is fair to say that we have a good track record for understanding what types of problems most people face with boilers, especially when it comes to those winter months in the UK. Therefore, we have compiled a list of five of the common boiler problems you may be experiencing. 


The five most common causes of boiler breakdowns include:


  1. Boiler leaks
  2. No heating or hot water
  3. Radiator faults
  4. Low boiler pressure
  5. The pilot light keeps going out


1. Boiler leaks

One of the most common boiler problems that we typically see on a day-to-day basis is a boiler leak. If you notice that your boiler has puddles beneath it or damp patches near the boiler, indicating water escaping the system, it is clear that your boiler is leaking. 


Unusual sounds, such as dripping or hissing, might suggest a leak in the pipes. Changes in the boiler’s behaviour, like a drop in pressure or reduced performance, could be signs of a leak affecting its efficiency. Additionally, visible corrosion, rust, or water stains on the boiler or pipes may indicate ongoing leaks.


A leak is a serious issue and needs to be repaired by a qualified boiler repairs expert. One important factor to remember is to never try and repair your boiler leak yourself. Not only can it be a huge risk to your health and safety but also can cause irreparable damage to the boiler itself costing you more money on a new boiler installation. If you live in the South Wales area speak with us today on 02920 508711 and get a boiler repair expert sent out to your home quickly. 

2. No heating or hot water

Another frequent boiler problem is that your property has been left with no heating or hot water. If you are experiencing this issue, it is clear that your boiler is experiencing some sort of issue.


Some of the most common reasons as to why your boiler is not heating your property or water include the boiler pressure becoming too high or low so the system has automatically turned off. Another reason could be that your boiler has become disconnected form the power, gas or water supply. Piping issues such as frozen condensate pipes are also frequent issues that can stop a boiler from functioning.


If your property is experiencing no heat or no hot water it is recommended that you get in contact with a professional boiler repair expert who will be able to diagnose and amend the issue. 

3. Radiator faults


A radiator fault can be hard to determine however if you have noticed a specific group or certain radiators are not performing as they should be, there may be a particular reason why this occurring. 


Feeling for uneven heating across radiators or detecting cold spots, particularly near the top or bottom of the radiator, indicates potential issues like trapped air or sludge accumulation. Listen for unusual sounds such as gurgling or banging emanating from the radiators, this suggests that air or debris in the system and will need to be repaired. 


Check for leaks or dampness around the radiator valves or connections, and note if certain radiators fail to heat up at all when the system is on. These signs hint at possible blockages or valve problems. 


Given the complexity of heating systems, consulting a professional plumber or heating engineer is highly advised to accurately diagnose and fix the issue at hand.

4. Low boiler pressure

Low boiler pressure is another common fault that we typically see when it comes to repairing a boiler system. Low boiler pressure can lead to cold radiators and a lack of hot water throughout your property.


You can identify low boiler pressure by checking the boiler display panel and looking at the measurement that is shown. The average pressure level of a boiler should be around 1.5 bars therefore, if your boiler is far below this, it is recommended that you get in contact with a boiler repair expert so they can identify the issue at hand. 

5. The pilot light keeps going out


The pilot light going out is a problem we also face when dealing with faulty boilers and heating systems. The pilot light is the small gas burner which is kept lit up permanently. If the light goes out, it is a common problem that can be caused by a build-up on the gas nozzle or a draft of wind blowing the flame out. A broken thermocouple could also be stopping the gas supply hence why the light is out. 


To check whether your boiler is working you can test that the gas appliances in your home are working as normal. If the gas supply is fine, attempt to relight the pilot light following your boiler manufacturer’s instructions from the manual. In case you’ve misplaced the manual, it’s often available on the manufacturer’s website. Notably, this issue is more prevalent in older boilers; modern systems typically use electronic ignition rather than pilot lights. If the pilot light problem persists despite troubleshooting, it might be advisable to consider installing a new boiler for enhanced reliability and efficiency.


If your appliances are not working after checking that your pilot light is out, please speak with a qualified boiler repairs expert. 




In conclusion, it is important to be vigilant if you notice any issues with your boiler on your property. Not only can staying vigilant help save you time and prevent further damage to the heating system in your home but it can also save you a lot of money on boiler repairs if you notice the common signs early enough.


Not to mention that regular boiler maintenance can not only prevent these five common issues mentioned throughout this article from occurring but also guarantee a consistently efficient and safe heating system that is unlikely to break down during the winter months when you need it the most.


If you notice that you are suffering from any of the five boiler problems mentioned in this article or are unsure about the current problem your boiler is suffering from, here at Eric Collier & Son we can provide rapid, reliable and expert boiler repairs. Remember, in the face of a plumbing emergency, the sooner you act, the better the outcome. 


For any emergency plumbing needs in Cardiff and South Wales, don’t hesitate to call us at 02920 508711 or contact us online. We’re here to ensure your plumbing emergencies are handled with the utmost professionalism and efficiency.

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