Causes of Why Your Boiler Isn’t Lighting & Solutions

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The boiler has not been ignited. It’s not just you! This is a common problem that many homeowners encounter. The good news is that it usually just requires a few easy actions to solve the problem.

Your boiler might not be starting for a variety of reasons. Among the most frequent are faults with the thermostat, electrical problems, and a lack of gasoline. It is crucial to conduct a comprehensive investigation to identify the core cause of the problem before making any attempts to address it.

In this article, we’ll look at some of the most typical causes of the boiler not starting issues and how to fix them. We will also go through the safety precautions you must take before making repairs. You may swiftly fix the problem by identifying the numerous causes and taking the appropriate steps to fix the boiler.

Causes of a Faulty Boiler



The first thing to check if your boiler won’t ignite is whether there is enough gas. If there is not enough gas in the boiler, your home won’t be able to be heated or lit. If you don’t have any gas, you must call your gas provider to plan a delivery.


The boiler might not turn on if the pilot light is out. You can try to relight the pilot by following the instructions in the boiler’s manual. If you are unable to relight it, seek assistance from a skilled heating technician.


Another probable cause of a non-starting boiler is a broken thermostat. The boiler cannot turn on if the thermostat isn’t working properly, since it won’t be able to send the signals it needs. You can make an effort to reset the thermostat by following the instructions in the boiler’s manual. You’ll need to contact a licensed heating expert for assistance if the reset doesn’t work.


Your boiler might not be able to start if it has electrical issues. A control board breakdown or a wiring problem could be to blame for this. You should get in touch with a certified engineers for aid with diagnosis and repair if you think there might be an electrical issue.


Blockages in a boiler can stop air and gas from getting to the burner, which makes it impossible to light the boiler. If you are unable to remove any obstacles on your own, you should seek the help of a knowledgeable heating specialist.

Safety Advice

You must take a number of safety measures before conducting any boiler repairs. You must make sure that the boiler’s electricity is turned off before doing repairs. Additionally, make sure you have the right tools and safety gear, including gloves, safety glasses, and a mask. It is dangerous to attempt to fix a boiler unless you are qualified to do so.


A common problem with numerous probable causes is a boiler that won’t start. The most frequent causes are a loss of power, a broken thermostat, or a gas supply issue. Rarely, a diverter valve issue, a gas valve issue, or a fan motor issue can all contribute to a boiler failing to ignite.

If a boiler won’t ignite, start by checking the electricity, thermostat, and gas supply. Check to see that the fan motor, gas valve, and diverter valve are all working. These parts need to be changed or serviced if they are not operating properly. The best course of action is to seek the help of a specialist if none of these remedies have been successful in resolving the problem.

  Please contact NG Installs if you need gas boiler service anywhere in the United Kingdom. We’ll help you get your boilers ready for winter today. Call now for a free estimate.

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