The Most Common Home Boiler Problems Explained

May 16, 2019

This is a collaborative post

If you’re experiencing problems with your boiler, you’re not alone. Around 20% of boilers break down annually. Many common problems can be avoided through yearly servicing, early troubleshooting and taking a few preventative measures in the beginning. Most usually break down during the winter when more strain is put on central heating systems. 

While some of these problems can be addressed through some handy DIY work, it’s always wise to call in a qualified professional to resolve any issues and prevent them from reoccurring in the future. With that said, here are the most common boiler problems and their potential causes.


There are a number of issues that could be causing leakages or dripping in your boiler depending on where the leakage is located. Internal components are usually to blame. In the case of a pressure valve, the boiler pressure could be too high. If it’s the pump seal, it may need replacing from being worn out. 

If the leakage is located around the pipes or tank, there could be an improperly fitted component or corrosion. These types of issues can be costly to repair as in some cases, the entire unit may need replacement. 

Taking out affordable boiler cover through a company such as Certi can save you from this issue in the future. Their home emergency cover is even better, as it includes a boiler health check and service, in addition, to cover for central heating, plumbing, drains, security, pests, electrics and more. Qualified engineers and 24/7 service come as standard. You can follow the link for more information –

No Heat

Start by checking whether the issue stems from your boiler or thermostat. It can be anything from a broken diaphragm to valve failure or low water levels. A parts replacement is usually necessary in these cases. Other potential causes include broken airlocks or issues with your thermostat. 

Odd Sounds

If your boiler is making whistling, banging or gurgling sounds, it’s usually because of air in the system or a pump failure. You can try bleeding your radiators in order to flush out any air that’s stuck in the pipes. Kettling could also be an issue, in which case there is a limescale build-up within the boiler or piping system.

Pilot Light Flame is Out

If the pilot light (a small blue flame that lights larger burners) is out, it could be due to a broken thermocouple that’s stopping gas from coming in, or a build-up of matter around the pilot light. Before attempting to relight it, determine whether it’s an issue with your gas supply by checking your other gas appliances. 

Low Pressure

This is as simple as checking the pressure gauge. If the value is below 1, it could be due to leakages, recently bled radiators, or a pressure relief valve that needs replacement. You should check for leaks in the system and attempt to readjust the pressure if possible. If you’re unsure how to do this, it can be checked here: 

While parts replacements may not always be too costly, having to replace your entire boiler definitely can be. Therefore, it’s wise to cover yourself against issues like this, especially when it comes to appliances that are expensive to replace. 

You Might Also Like

No Comments

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.