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Last Updated on January 22, 2021

How To Turn On a Boiler – How To Turn It Off?

Zac Houghton

Zac Houghton

Construction expert and founder of Loftera.

To some, this might sound like a fairly straightforward question, but what we really mean by this is: how do you turn your boiler on/off safely? With older gas boilers, for instance, they can be temperamental as is, so failing to switch them on and off securely can be dangerous.

If you’ve only recently moved into your first home/flat, or perhaps have a different model that you’re not familiar with, it’s important to know how to turn off boilers properly. Many people choose to turn their boiler off when going on holiday to save energy and whilst the savings are usually minimal, it’s important to know how your system works regardless.

How to turn on a boiler

Table of Contents

1. How to turn off a boiler

Whilst turning off the heating can be as simple as finding the control panel and turning the dial to the off position, or simply finding the mains switch, there are extra steps you should take in order to shut down your boiler completely.

If you have a modern combi boiler, then the hot water is supplied directly, so closing the mains stop valve will shut it off. On the other hand, if you’re wondering how to turn off a gas boiler that has a separate hot water cylinder, find the supply valve on the pipe from the water tank/cylinder itself and turn it off. This ensures that no extra fluid leaks into the system.

2. Turning it back on

In terms of switching your boiler back on, it should be a simple case of reversing the process. Firstly, open back up any water supply valves you have closed off to allow water to fill up the cistern. The next step is to turn back on the energy supply at the mains and for modern electric and gas boilers, turn the heating and hot water dials back on or to the desired position/heat on your thermostat.

3. Set the timer

Next up is to set the timer for your hot water and heating to come on. We’re sure you know all about the ideal times and what suits your schedule best, but here’s what we recommend:

  • Set your heating to come on half an hour before you usually get up to warm the house.
  • Have your hot water come on an hour or two before you wake up to give your water tank time to fill and get up to temperature.
  • Have the heating come on half an hour before you get home from work; same goes for the water, only maybe allowing an hour or two for the tank to fill up – this will ensure you have hot water ready for any showers/baths, cooking, washing up etc.
  • If home, use the heating intermittently throughout the day as you need it – having it on all day is bad for the environment and will prove costly.
  • Be sure to make sure the heating goes off at least half an hour before you go to bed.

That’s about it – a relatively short and sweet post this time but we hope you found it useful nonetheless. For more information on what to do with specific boilers, the best thing to do is to do your research and find the user manual for your particular model.

All the best!

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Boiler Broken Down?

Save up to 40% on a brand new boiler with flexible monthly payments.