No Power to Boiler: How to Fix Your Problems?

If your boiler has no power and you can’t figure out why, this guide will help. We will outline the six most common issues that it could be and suggest how these problems can be fixed.

We will also tell you everything you need to know about when you need professional help and when you could solve the problem yourself.

There is nothing more frustrating than going to run a bath or switch on the heating on a cold day only to find that your boiler has no power.

It is a common issue yet the majority of people will have no idea where to start fixing it and are likely to end up waiting days or weeks for an engineer to solve the problem for them.

In this guide, we will help you determine what the problem is and decide on the best course of action to get your boiler functioning again as quickly as possible.

So, don’t get in a tizzy. Instead, take five minutes to read our expert advice so you can make an informed decision about how to fix your boiler.


Why Your Boiler Has No Power

There are lots of different reasons why your boiler might have no power; far too many to list in this short article. So, we have identified the six most common causes of this problem based on our own professional experiences.

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As well as explaining what the cause of the problem is, we also recommend the best way to get the issue fixed.

#1 – Blown Fuse

Like most electrical appliances, boilers are fitted with a fuse that is designed to stop the electrical components in them from getting damaged if there is a problem.

That fuse can blow for all sorts of different reasons and when it does, your boiler will have no power and won’t turn on.

If you get the fuse in your boiler changed, this should fix the issue and restore power to your boiler. But it is worth getting a trained engineer to do the work for you just in case the blown fuse indicates another problem that could cause it to blow again

#2 – Tripped Fuse in your fuse box

Another fuse related issue could also be the cause of the problem. If your boiler is connected to a zone in your home that has had another issue (such as a blown light bulb or a power surge), this could have caused a fuse to trip in your RCB (fuse box).

This would stop any power getting to your boiler. This is a simple thing that you can easily fix yourself.

Just find your RCB fuse box and check that all the switches are in the same position. If one has tripped, all you need to do is reset it and your boiler should have power again.

#3 – Electric Meter

If you have a pay-as-you-go electric meter, it is possible that no power to your boiler could mean you have run out of credit. If this is the case, you are likely to have no power to your entire property, not just the boiler.

If this is the problem, you will need to add credit to your meter in order to restore power. This can usually be done online or over the phone these days, but whatever method you usually use to top up your electricity credit should be fine.

#4 – PCB (Printed Circuit Board) Failure

The Printed Circuit Board (PCB) is a vital component of your boiler. It helps the other different components communicate with each other and remain operational.

If you have no power in your boiler, it is possible that your PCB could have failed. This is a major problem and one you will need an engineer to take a look at.

An engineer will be able to run a simple electrical test to see if the PCB is functional, whether there is a fault, or whether the entire component is broken.

If it is the latter, unfortunately, this is a major problem. A new PCB can cost as much as £500 plus the installation costs.

If you have an older boiler, the chances are that your engineer will advise you to buy a whole new boiler. In the long run, this will end up saving you money.

If you need a new boiler, our advice would be to take a look at WARMZILLA. They are an online installation company that can offer high-quality boilers at bargain-basement prices. They can also offer great deals on installation and special offers you won’t find elsewhere, such as extended warranties.

If you want to get a no-obligation fixed-price quote from WARMZILLA, just visit their website and fill in their online form. You won’t need to give them any personal information and they will offer you a range of quotes on a boiler that is perfect for your home.

In our experience, you are unlikely to find a more cost-effective boiler elsewhere.

#5 – Power Light Failure

A less severe problem that could be causing the appearance of a lack of power is if the power light on your boiler has broken.

This is usually an LED and these can go wrong occasionally. It is rare, but when the light has gone wrong, a simple electrical test can identify the issue and your gas engineer will be able to install a replacement LED. They are not expensive and are easy to fix.

#6 – Fused Spur Broken

You may not know what a fused spur is but you will know what one looks like. It is a socket with a little red window and it is usually how big appliances such as ovens and boilers are segregated from the main electrical circuit in your property.

It is rare, but sometimes these fused spurs can go wrong. If that is the problem, your boiler will be unable to get electricity from the mains and so won’t have power.

It is worth checking that the fused spur that your boiler is connected to is working before spending big sums to get your boiler looked at. These are far cheaper and easier to repair than most boiler components.

What To Do After Your Boiler Is Fixed

If your boiler has been repaired after having no power, you will need to reset it before it can resume working again.

Most new boilers will have a reset button on their display board on the front of the boiler. Just pressing this will reset the boiler and get it working again.

If you have an older model that doesn’t have a reset button clearly visible, our best advice is to check the manual. It may have a reset button hidden away somewhere or it could have a more complex reset process you have to follow.

If you don’t have a copy of the manual anymore, take a look online, or contact the manufacturer. The information will definitely be out there somewhere.

Where to look if you need a new boiler

If you have an old boiler that is going to cost a lot of money to replace, our best advice is to consider whether you would be better off buying a whole new one. These are far cheaper than they used to be and with older boilers likely to need more and more expensive repairs, you are likely to save more money in the long run.

ALSO READ: What size boiler do I need?

If you are in the market for a new boiler, you should get as many quotes as you can to ensure you are getting the best possible deal. Make sure all your quotes include everything you need, including installation costs and any extras you might need.

Also, remember to consider online suppliers too. WARMZILLA is our favourite online boiler installation company. They offer high-quality boilers at great prices and can offer next-day installation, great special offers, and good finance deals too.

You can get a fixed-price quote from WARMZILLA without sharing any private information with them by filling in their online form. It only takes a couple of minutes and you can end up saving hundreds of pounds on a new boiler.


A loss of power to your boiler is a common problem. There are lots of different reasons why this problem could arise. Some are minor issues while others are more serious.

In this guide, we have outlined the six most common issues that can result in no power getting to your boiler. We have explained what causes the problem and what you need to do to fix it.

We have also suggested that there are times when you might want to consider getting a new boiler instead of spending big sums fixing your old one and recommended WARMZILLA, an excellent online installation company that is well worth getting a quote from.

Have you had an issue with no power supply to your boiler? What caused the problem and how did you resolve it? Do you have any tips or advice for our readers we haven’t offered in this guide?

It is always useful to hear about real-life experiences, so please do share yours with us using the comment box below.

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