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Last Updated on October 6, 2021

Boiler Maintenance: 10 Tips for Keeping Your Boiler in Tip-Top Condition

Zac Houghton

Zac Houghton

Construction expert and founder of Loftera.

The weather in the UK can be unpredictable. The cold is likely to creep in. A boiler is essential to prevent oneself from freezing. Hence, you must take care of it. 

A well-maintained boiler will not only work to perfection, but it will also help save you money on energy bills. Heating consumption costs around 25 percent of annual energy consumption on average.

If the boiler is not in tip-top condition, you will struggle to keep warm and would need to replace it early on regardless of how old your boiler might be. However, there is no need to worry as we share the top tips that will help keep your boiler in excellent condition.

boiler maintenance

Table of Contents

1. Ensure Regular Cleaning

When it comes to a boiler, you need to regularly clean it. A well-maintained heating system will help you save up on energy consumption. Only if your boiler is clean would it work efficiently. Here is what you should do. 

  • Start by turning off the boiler. Locate the main switch and switch it off. 
  • Wait at least 2 hours for the unit to cool down. Otherwise, you would burn yourself.
  • Use screwdrivers for removing the cover and vent stack. 
  • Then, check the soot to make sure that there is not too much of it as it would lead to bad combustion. Even a thin layer of residue can decrease the efficiency of your boiler. 
  • Scrub the tubes thoroughly to clean the boiler unit using a cleaning brush. 
  • Then, pour some clean water to wash the tubes. 
  • Wait for the tubes to dry before vacuuming the bottom and outside area. 
  • Next, you should also check the joints to check if unwanted air does not come in. Otherwise, it would reduce the efficiency of the boiler. 
  • Finally, reassemble the pieces and restart the boiler unit. 

2. Hire Official Boiler Servicing

Although you must regularly clean the boiler, you still have to hire an official boiler servicing once a year for the best results. Besides, a professional who has a valid gas safety certificate would ensure that your boiler lasts longer. 

Since purchasing a new boiler is extremely expensive, it is a good idea to turn to an expert who would go out of his way to thoroughly clean your boiler. Moreover, homeowners have a responsibility to get their boilers serviced if they rent out their properties. 

The gas inspection will involve the taps, piping, and gas appliances. Prevention is always better. It could not be truer when it comes to the boiler. 

The engineer will ensure preventive maintenance. Besides, boiler surfaces can be dangerous to inspect. Hence, it is best to leave the work to an expert.

There is also a risk that you might damage the boiler. Here are some of the things that are guaranteed when you hire a gas safety engineer.

  • Check for leaks under and around the boiler.
  • Ensure that there are no obstructions.
  • Check to see if the pressure and temperature are working within the normal range.
  • Look for errors on the display panel. 
  • Make sure that the combustion air openings do not experience any blockage.
  • Carefully listen to the boiler to ensure that there are no unusual noises or vibrations. 

3. Keep the Boiler Well-Connected

Another tip that will help keep your boiler in great condition is ensuring that the boiler is well-connected. A well-connected boiler offers amazing performance. It is always worth it to check if all the connections have been plugged in properly.

Check the gas pipes and the electrical connections along with the water connections. You will need to inspect both the incoming and outgoing water connections so that water flow remains optimal. 

4. Check Water Quality

A notable tip that you should consider for keeping the boiler in good condition is checking water quality as it indicates the health of your boiler. If the water in the boiler is free from debris or oil residue and clear, it means that it is working properly. 

On the other hand, if the water quality is poor, it would take a toll on the boiler. Since the boiler converts water into steam, you need to make sure that the water used is clean and of good quality. Dirty water causes short cycling and wet steam. 

Check the gauge and see if there are any signs of a dirty boiler. If you find any issues, you must hire a professional to help you out.

5. Set the Right Pressure

The boiler needs to have an operating pressure of around 1.2 to 1.5 bars. When you switch it on, you should wait a few minutes to see if it meets the parameters.

If the pressure is very high, you will need to use the radiators to reduce the pressure. On the other hand, if the pressure seems to be quite low, it is advised that you open the tap a bit to allow more water to make its way to the heating circuit.

6. Get the Temperature Right

To take good care of your boiler, you must get the temperature right. Generally, the temperature should be 18 ºC when you leave for work or go to sleep. However, the temperature needs to be 21 ºC during active hours. 

A tip that will help keep your temperature low is dressing adequately. Winter is a great time to wear cozy apparel. Therefore, you would be able to keep the temperature as low as 18 ºC at all times.

7. Monitor the Radiators

The radiators in your home need to be closely monitored. You must purge them to eliminate the air accumulated inside. To avoid soaking your carpet, you need to use a recipient and a screwdriver. 

As you twist the purging valve of the radiators, you will hear a sound resembling a whistle. The moment the sound stops, you will start to see drops of water pouring out. Now, you can proceed with closing the purge valve as the air would escape. 

If you plan on going somewhere for a while, close the main gas service valve. Always be vigilant and contact a professional if something unexpected occurs.

8. Open the Doors If You Notice a Smell of Gas

In addition to the above, you must open the doors and windows if you start to notice a smell of gas. Close the main gas service valve and avoid using any of the electrical switches. Make sure to call an emergency gas service provider immediately for help. For more tips on what to do when you start smelling natural gas, read this detailed guide. 

9. Consider Insulation

If you want the boiler to continue operating properly, you should consider adding insulation. Condensation build-up needs to be regularly drained away to ensure that the boiler works properly.

When the valves and piping are not insulated, they will take a toll on the efficiency of your boiler. Thus, you would need to pay a higher electricity bill. To avoid this, you must insulate the piping and valves.

10. Keep the Boiler Ventilated

Finally, it is also important that you keep the boiler well ventilated. Boilers need sufficient space to operate efficiently. Therefore, it makes sense to provide them with plenty of room. 

The boiler should never be too cluttered. Ensure that there is a gap of 700mm between any obstruction and the boiler.    


Once you have gone over our tips, you will know how to keep your boiler in perfect condition. From ensuring regular cleaning to keeping the boiler ventilated, each tip will help extend your boiler’s life.

There is always a silver lining in boiler maintenance. It will prevent the need to purchase a new boiler before its expected life comes to an end. Bookmark our page so that you can come back to it and stay in the know.