Open now until 9pm
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
We operate to the highest standards, that’s why we’re endorsed as a Which? Trusted Trader.
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/
 Online discount is available to domestic gas and LPG customers who receive an online quote for all boiler brands excluding Vokera. Discount will be applied as long as the quoted price is still applicable at the point of sale.
Online discounted price is only available for the duration of the 14-day quote validity which starts from the day the quote was given.
Offer is not available to Help-Link UK Ltd employees.
Online discount can be applied as follows:
All boiler manufacturer types excluding Vokera are eligible for a 5% discount off the final quoted price. Conventional to combi boiler swaps also qualify for an additional £50 discount after 5% initial discount is applied.
This offer cannot be used in conjunction with any other offers.
Offer available from April 2017. Any boiler quotations before this date will not be eligible for the discount post purchase. Help-Link UK Ltd have the right to withdraw or change the offer at any time.
Online discount is automatically applied when the customer gets a quote using the online quote system at www.help-link.co.uk and as long as the customer meets all the above criteria.
Help-Link UK Ltd is authorised and regulated in the UK by the Financial Conduct Authority FRN 689798 for credit broking activities
Help-Link UK Ltd, 3310 Century Way, Thorpe Park, Leeds, LS15 8ZB | VAT Number: GB 277 8107 71. Company Reg: 03527087
© Help-Link UK Ltd 2017