The Ultimate Boiler Fault Finding Resource [40 Detailed Guides Included]

Over the last year, we’ve posted over 100 heating articles, many of which relate to boiler fault finding and central heating problems. 

I’ve spent a while trying to organise 40 of them in a way that helps readers quickly and easy find the article they need, to diagnose their boiler fault.

We’ll be using this page as our central heating and boiler fault finding resource guide, and will be adding to it over time. So, feel free to bookmark it and come back to it when you’re stuck.

Boiler Fault Finding Preamble

To begin, we’ve created a generic guide to boiler problems here. It’s a good starting point.

That’s going to be useful if you have no idea what’s causing the problem. Once you’ve used that boiler problem guide to figure out what could be causing the issue, come back to this page and you’ll find the specific guide listed below.

Not all boiler fault-finding missions are going to end positively. For when they don’t, we’d suggest checking out Heatable. They’re a reputable online boiler installation company with great connections with boiler manufacturers, who always put customers first.

That means installation of Worcester boilers with Heatable are about as cheap as you’ll find. We got a quote for a new Worcester 30i at £1,770 fixed.

Worcester Bosch Greenstar i from Heatable

Boiler Fault Finding Guide

Boiler Parts

If you suspect your boiler fault relates to a specific part, click on the relevant links below.

We’d always suggest getting repair quotes. But, if your boiler is out of warranty and likely to cost £400+, it might be time to consider a replacement. You can get on-screen prices (no personal details needed) within 2 minutes, using this clickable form.

Noisy Boilers & Central Heating

Guides for boiler fault finding that relates to any noisy part of a central heating system are listed here.

Boiler Fault Finding For Pressure & Leaks

Any issues relating to boiler fault finding for leaks and pressure have been added below.

What kind of fuel does your boiler use?

Grab your fixed price online by 3PM, and get next-day boiler installation.

Worcester boilers installed from as little as £1,795.

Boiler Lockouts

Causes, fixes and fault-finding guides for boiler lockouts.

Brand & Model Specific Boiler Fault Finding

Not sure what part is causing the issue, but know the brand or model?

Click on the relevant link below to start fault finding your boiler brand.

What’s Next?

Thanks for reading.

Looking to replace your old and unreliable boiler? Use this 90 second clickable form to get fixed prices on screen.

Heatable new boilers

If you’re struggling to fix a problem (or its gas related), you can get a qualified engineer to come and give you a hand here.

We’re always trying to create new articles.

So, if your problem isn’t listed above, feel free to leave a comment and we’ll do our best to help.



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  1. Hi
    I have old boiler called my son does not work there is no flame light it’s off when I try to push it on to get the system running does not work any ideas what need to be done please.
    Many thanks

  2. Hi, my heating pump is making a hideous squeaking noise and gets red hot.
    This seems to be an intermittent problem (we managed to get 2 months of peace but it has now returned).
    I have tried bleeding it a few times but this doesn’t seem to help. Heating works absolutely fine but the noise is unbearable, open to suggestions?

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