Open today from 8am - 4pm
0203 841 5320
Gas Safe Register is the official gas registration body for the UK, Isle of Man and Guernsey, appointed by the relevant Health and Safety Authority for each area. By law all gas engineers must be on the Gas Safe Register.
Visit the Gas Safe website to verify our accreditation
Simply answer a few multiple choice questions about your existing boiler and we’ll give you a fixed price for a new boiler including all parts and installation
Occasionally you may find that there are patches in your radiators that aren't heating up. This is normal even when your boiler and radiators are in good operating condition, and can usually be resolved yourself. The solution will vary depending on whether the radiator is cold at the top, in the middle or at the bottom.
If your radiator is cold at the top and hot at the bottom, there is most likely trapped air in the system. This can be resolved by simply bleeding the radiator to release the trapped air. Follow our step-by-step guide on how to bleed a radiator here.
If your radiator is cold in the middle, there could be a buildup of rust and sludge trapped inside the system. This is easily fixed by cleaning out the radiator and removing all unwanted substances that are obstructing the bottom length of the radiator. You'll need to remove the radiator and flush it out to clean it. In some cases, your radiator will need replacing which should be done by a registered gas engineer.
If you have an open-vent system which is un-pressurized and tank fed, you will be able to use a sludge remover that can be bought from most DIY stores. To flush the system out, you can either add the liquid to the feed and expansion tank, or alternatively you can attempt to empty and refill the system after a few days.
If you have a pressurized system, you'll need a Gas Safe engineer to help you.
Radiators that are cold at the bottom and hot at the top can be caused by a build-up of scale, rust and sludge over a period of time. A mixture of these materials can cause a blockage and obstruct the flow of water. To rectify this, you'll need to flush your radiator. This should lead to the release of the debris, meaning the flow of water is restored.
As with the middle of your radiator, if you have an open-vent system which is un-pressurized and tank fed, you will be able to use a sludge remover to flush your radiator. However, if you have a pressurized system, you'll need a Gas Safe engineer to help you.
If you experience persistent cold patches in your radiators, contact us on 0203 805 4581 for advice on what to do next and if necessary we'll arrange for one of our Gas Safe engineers to visit you.
We’re all about the personal touch, so fill in the form below to give us an idea of where you are and one of our local advisors will give you a call back quick-sharp.
If you know exactly what you‘re after, call the number below
0203 805 4581
Chat to one of our customer service champions now with our live chat systemChat now
 Exclusions apply. See www.help-link.co.uk/fixed-price-quote-faqs/
Help-Link UK Limited is an appointed representative of HomeServe Membership Limited. HomeServe Membership Limited is authorised and regulated by the Financial Conduct Authority for general insurance and credit broking activities; Financial Services Register number 312518. Registered in England under company number 2770612. Help-Link UK Limited is part of the HomeServe group of companies. Registered office is at Century Way, Thorpe Park, Leeds, West Yorkshire, LS15 8ZB. Financial Services Register number 834211. VAT Number GB 559 6696 69.
© Help-Link UK Limited 2020