Boiler problems are inevitable, and the situation worsens when these problems arise in the winter. One common problem that homeowners face is no power to the boiler. In this situation, your thermostat and boiler are not receiving any power, leaving you helpless without heating or hot water.
Power failure in your boiler occurs mainly due to electrical problems, meaning solving them requires expertise. But don’t worry; in this blog, I will tell you about the reasons for no power to your boiler and possible fixes. Some of these fixes can be performed by yourself, and some will require the assistance of a Gas Safe-certified engineer.
To know the common reasons behind the boiler not working and no power, you will need to perform some checks, and for some checks, you will need to contact a Gas Safe Engineer and let him inspect the problem.
Checks You Need To Do
1. Check your home’s electrical supply
This is the most basic check to be assured that the problem lies with your boiler and not the electric supply of your home. Most times, your boiler is not powering up because of an electrical fault in your home. Check whether your other electrical appliances work to know whether the electrical supply works or not. If other appliances work fine and only the boiler is off, the problem is with your boiler.
On the other hand, if your other appliances, such as TVs, microwaves, and electric ovens, are not powering up along with your boiler, you are likely facing an issue with your home’s electrical supply, and to resolve it, you will need to contact your area’s electricity provider. Also, I suggest you check your electric metre and see if there is any remaining credit.
Related Article: How To Identify The Source Of An Electrical Fault
2. Check for a blown fuse
A blown fuse box is the most common reason for your boiler not powering up. Like many other electrical appliances, the boiler also has a fuse. The fuse is crucial, as if something goes wrong with the electrical component of your boiler or any other appliance, causing a power surge, the fuse then breaks the circuit.
The fuse can do that because it consists of a wire that starts to melt when too much current flows. This function of the fuse box helps protect the wiring and your boiler from further damage. However, a blown fuse box will protect your boiler and cause it to lose power until you replace it.
To check a blown fuse, Locate your house fuse box; you could find it in the hallway communal cupboard, locked cupboard, or under the stairs. After locating your fuse box or consumer unit, see whether the circuit is on or off. If it’s on, the switch will be pointing up; if it’s off, it will be pointing down. If your boiler does not power up due to a blown fuse, you will notice that one of the switches is pointing down. In this situation, you must flick the switch back up, and your boiler will power up.
Related Article: How to repair a fuse in a fuse box
3. Check whether your RCD has tripped
Another common issue related to your fuse box is a tripped RCD. A residual current device is a life-saving device that trips as a safety precaution when there are sudden faults in your electrical circuit.
Your boiler consumes a lot of electricity to operate, so it might have its switch or share a zone with other appliances. So if an electrical fault arises with your boiler, RCD will trip and affect the zone, resulting in your boiler tripping along with appliances sharing a zone.
The reasons behind the RCD-tripped switch are multiple: a power surge, leakage in the boiler, or power cuts. To deal with this situation, you must do the same thing you did for the boiler fuse: locate the box, find the boiler switch pointing down, and flick it back up to turn the circuit back on. But the problem will not be solved entirely, and you will need to reset your boiler after turning the switch back on.
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Checks That a Gas Safe Engineer Should Do
After mentioning the steps to restore power to the boiler that you can perform, it’s time to tell you about the checks that a Gas Safe engineer should perform, as these checks involve technicality and expertise that should be best left to a certified professional.
If you don’t know whom to contact, 24|7 Home Rescue can help you book an appointment with a Gas Safe Engineer.
1. Checking a blown internal fuse
The boiler is one of the large appliances in your home that consumes a lot of electricity; because of this, it has a fuse or fuse to separate it from the primary electrical circuit. Your boiler can have a single fuse and multiple internal fuses called fuse spurs. These spurs look like a socket with a little red window on it.
So if your boiler’s internal fuse blows up, then your boiler will not power up. If you suspect a blown fuse because, as mentioned above, checks didn’t work, you will need to contact a Gas Safe engineer to solve the problem.
After consulting you, the engineer will visit your site, inspect your boiler-blown fuse, and replace it if needed. Also, he will ensure that everything is working fine so that the fuse in your boiler doesn’t get blown shortly.
2. Checking the faults within the boiler’s PCB
Another reason your boiler loses power can be related to the PCB (Printed Circuit Board). The PCB is the control centre of your boiler, responsible for synchronising all the internal components and ensuring your boiler provides you with uninterrupted hot water and heating.
However, Boiler PCB faults will halt your boiler’s operations, resulting in power loss and your boiler getting completely switched while displaying relevant error codes on your boiler.
If PCB error codes are displayed on your boiler screen, contact a Gas Safe Engineer. He will visit your home to inspect your boiler’s PCB; if the situation worsens, he might suggest you replace your PCB, which will cost around £350 to £500.
If this is the case and your boiler is old, I suggest you invest in a new boiler that will cost around £600–£2,500, depending upon the model and the type of system you choose.
3. Checking for faults with the LED lights
Lastly, not the typical reason, but a possible one behind your boiler losing power is the LED power light not working, which makes you think that the boiler is not powering up as it shows no light on the boiler when the problem is only with the faulty light. Fixing the power light issue is simple and cheap.
Contact a Gas Safe Engineer; he will inspect the problem, run a few tests, and replace or repair your power light according to the situation.
4. Reset your boiler
You must reset your boiler after solving the electrical issues by yourself or consulting a certified professional. Resetting your boiler is simple; you will only need to do the following:
- Locate the boiler’s reset button.
- After finding it, press and hold the button for 10 seconds.
- Check whether the flame has been lit or not.
- After checking the flame, see whether the hot water supply and heating work.
If you want more details regarding resetting your boiler, read our blog: How to Reset Your Boiler.
After reading the above, I hope you can solve the problem of your boiler not powering up. If the above guide did not help much, the problem might be more severe, and a Gas Safe Engineer must look into this problem.
If you don’t know how to find an engineer, contact 24|7 Home Rescue, and one of our representatives will assist you with your situation and book your appointment with a Gas Safe Engineer.
Also, if you are facing boiler problems, i.e., your boiler is not working, and you don’t know what to do when your boiler breaks down, then 24|7 Home Rescue can also help you get breakdown cover for your boiler and can also help you get a new boiler.