Boiler Maintenance tips for your home

When it comes to boiler maintenance, you probably think it’s best to leave it to the experts, you would be right as well. However, to prolong the lifespan of your boiler system and reduce the risk of breakdowns, there are best practices you could be doing in addition to the maintenance services. See what JCW Saunders’ experts would recommend:

Annual Service:


This one is a no-brainer, manufacturers require this to be carried out by an approved GasSafe engineer in order for the boiler to be warrantied. Read our blog on the importance of this service and the key differences between this and the annual gas safety check.

Carbon monoxide safety:

One of the signs of a faulty boiler is when it produces carbon monoxide gas, this is an odourless and colourless gas, that can kill. Every home with a boiler should have a carbon monoxide detector, this not only detects the fault with the boiler early, but can also save lives.

Summer time:

If you do not use your heating system for a long period, it could seize up. JCW Saunders recommend that the heating gets turned on for around 15 minutes now again during the inactive months, this prevents issues when the colder months come back around.

Blue flame:

The flame of the boiler should be a clear blue. Any yellow, orange or smoky flame on a boiler is not normal and can mean that the boiler is faulty, call a GasSafe engineer to have it inspected as soon as possible.

Power flushing:

jcwsaunders power flushing services

We have already blogged about the importance of power flushing. Black sludge: the oxide deposit that builds up over time inside of your radiators need flushing out now and again. It will help your boiler work more efficiently and the radiators to heat up more evenly.


As well as flushing out the black sludge, bleeding your radiators gets rid of the trapped air inside which could be a contributor towards the cold spots in your radiator. So before you turn up the heating on your boiler, check if bleeding works.


After bleeding the radiators, it is important to check the pressure gauge. It is likely to have dropped, and will need to be topped back up. The pressure should be from 1 to 1.5bar, have a look for a dial on the boiler front. Your Boiler manual should give you instructions on how to top the water. Be mindful as boilers also lose pressure over time, it helps to keep an eye on the gauge, or get it checked and serviced by a GasSafe engineer.


Over time the Pressure Release Valve becomes faulty, this could also be due to an overfilled boiler. If there is water dripping from the overflow pipe outside, this could be a sign for the faulty Pressure Release Valve. Call your local gassafe engineer.

Flues and Ventilation:

If you keep your boiler in a cupboard, be certain that it is properly ventilated. Making sure the boiler is housed in a clutter minimum environment, not only allows it to “breathe” properly, it would ensure that the boiler is accessible and can be maintained. Ventilation requirements are in the manufacturer’s instructions for your boiler. Dust build-up often occurs in the fan. Clearing all dust enables optimal efficiency.


If you keep shoes, coats and bags in the same cupboard as your boiler, dirt may accumulate and cause a blockage, this will affect the system from working well. Check the boiler room on a regular basis and clear any dust in sight to allow free passage of air.

Lastly Faults and repair:

gas repair jcw saunders

We know when the worst comes to it you will have to repair or replace your boiler, but unless you are a certified GasSafe engineer, do not try to do any boiler repairs yourself. Doing so may void the warranty of your equipment or make issues worse. We are of course happy to look into any issues you may come across with your heating system. Get in touch via the enquiry form.