Do your radiators have cold spots? Are they colder at the top than the middle or the bottom? These are classic signs of radiators having air trapped inside.
Air trapped in water pipes can cause irregular water, low water pressure, gurgling sounds or fluctuating water temperature? We detail some DIY ideas to fix it
On average, you can expect to pay anywhere from £75 to £120 for a standard boiler service, though this cost may increase for any additional repairs or parts