Boilers help in the production of steam. The production part of a steam system uses a boiler to add energy to a feed water supply to produce steam. The energy is released from the burning of fossil fuels or from process waste heat. A boiler has two key roles: to heat the air inside a house and to heat the house’s water. It does this by burning a fuel -oil or gas and makes boiling water. Some of this water feeds the plumbing system when the faucet is turned on. But it also pours through an organization of closed pipes and radiators throughout the house, transferring the warmth to the air. As the water cools down, they pump it back into the boiler to undergo the same process again. Most boilers tend to break down in winter and it is important to know certain techniques for emergency boiler repairs.

Emergency issues:

  • Pilot light: A very common issue is the pilot light that goes out which may be triggered by anything. The pilot light is your boiler’s tiny gas burner that is permanently kept alight by simple as a draught that blows the flame out or a build-up on the gas nozzle. 
  • Weird noises: The most probable source is air in the machine if your boiler makes weird noises. Low water pressure or a failing pump could be triggered.
  • No heat
  • Leaks: This could be due to a broken valve or seal, even corrosion.
  • Low pressure: Boiler’s pressure gauge shows a reading less than 1.
  • Partially warm radiators: The air in the central heating system could lead to cold radiators.
  • Thermostat: A defective thermostat causes issues with a boiler.
  • Condensate pipe: If you have a condensing boiler, it carries acidic water to an external drain causes the water to freeze and create noises.

Safe and Simple Ways to Check for Boiler-Related Problems

By executing simple checks, not only could you spot minor boiler glitches before they turn into grave issues but you may also be able to evade calling out a registered engineer.

Six safe checks you can carry out if your boiler isn’t functioning correctly.

Check for problems with your gas supply

When your boiler stops operating, there’s always a chance that your gas supply is triggering the issue, than your actual boiler. To understand whether you have an issue with your gas supply, make sure your gas stopcock is switched on and then check if your other gas appliances are operational. If you find that all of your gas appliances are refusing to work as well, it could be a gas supply problem that is affecting the area where you live. In this instance, you’ll need to contact your gas supplier.

Check that your water supply is switched on

Your boiler may not be operating properly because you might have unintentionally turned off your water supply, so it’s always best to check that it’s still switched on. You may find that you didn’t turn off your water source at all, in which case you should turn on your taps to see whether water is flowing out of them. If water is not coming out of the taps, get in touch with your water provider for help.

Check for difficulties with the power supply

If your boiler is plugged in but is not turning on, there may be a problem with the power supply and you will need to contact your electricity provider. However, if there has been a power cut and your boiler has lost your chosen settings, the fix may be as simple as resetting your boiler. To make sure your boiler is functioning properly, set it to turn on your heating in a few minutes time. If it does as you asked, simply chose your preferred settings to enable your boiler to behave as it did before the power cut occurred.

Check that the pressure of the boiler is set to the correct level

It is essential that your boiler has the right amount of pressure so that your hot water can circulate around your property. If the pressure is too low, your boiler will switch itself off and you’ll be left without any hot water. But if it’s too high, it causes unnecessary strain on the boiler and forces your system to break down. You can find out the required pressure for your boiler by reading the manufacturer’s manual, which will also tell you how to re-pressurize and bleed your boiler if it is, in fact, below or above the correct level. If the pressure is fine when you initially check it, you should call your gas supplier or a Gas Safe engineer.

Check the thermostat of your boiler

It’s always worth checking your boiler’s thermostat to ensure it’s still in the on position and set above room temperature. If it works on a timer and the clocks have gone backwards or forwards recently, you may need to adjust the settings. You may even find that the thermostat has failed and needs to be substituted.

Check for frozen pipes

All condensing boilers have a condensate pipe, which should lead outside of your home so that the acidic water can run into a drain. When it’s cold outside, your condensate pipe can become frozen and cause your boiler to shut down. Most modern boilers will warn you when this happens by displaying a fault or error code. Pouring warm (NOT boiling) water onto the frozen pipe will help to thaw it, but we recommend you call out a Gas Safe engineer if you would rather not do this yourself or this common boiler problem persists.

Boiler still not working?

If your boiler is faulty and you can’t find anything wrong with your gas, water, power, boiler pressure, thermostat, or pipes, you have no other choice but to contact a professional. You must check that your chosen engineer is Gas Safe registered as this confirms that they’re legally allowed to diagnose problems and work on your boiler.

Warning signs:

  • Clear signs of soot around the boiler or black marks.
  • You may smell the spent fumes or gas 

(If so, switch off your boiler straight away). 

  • You also get headaches and feel dizzy, nauseous or breathless (which could be caused by carbon monoxide poisoning)

You must shut your boiler off and notify gas safe engineer immediately if you are notified by either of these warning signs or are worried that your boilers is unsafe in any way at all.


Itwill depend on the extent of the damage and the scope of the work involved.  It’s impossible to tell exactly how much it will cost to repair an emergency one-off gas boiler because many engineers will bill for the time it takes them to fix your defective boiler. A fixed price boiler repair quote will be provided to you by certain engineers and businesses, 

Which should cover parts and labor, as well as the call-out fee and the time needed to fix it.


It is important to consider the age of the boiler as boilers over 10 to 15 years of age have higher chances of breakdown and therefore it is better to replace it. If you have repaired the boiler multiple times already then it is pointless to do one-time emergency repairs. The cost of repair might exceed the cost needed to buy a new boiler. The modern A-rated boilers are more efficient and eco-friendly as compare to age-old boilers.

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