To increase the pressure on your Worcester boiler you must add water to the heating system using a filling loop. The most common cause behind low boiler pressure (and this goes for all boilers, not only ones made by Worcester Bosch) is a leak. This is most likely an expansion vessel problem, if so, you will need to recharge the expansion vessel, or you’ll have to replace it if the diaphragm inside is split.

Similarly, bleeding your radiators can lead to a loss of boiler pressure, so it’s important to re-pressurise your boiler afterwards. When there is an issue or your gas boiler has stopped working, Worcester Bosch boilers display an error codeCarbon deposits on the light— Over time, carbon build-up may obstruct the light and cause it to malfunction. If you need to repressurise your Worcester boiler often you have a problem that you need to get fixed. If this doesn’t work, you may need a new boiler. If you do, find out how much a new boiler costs now a get a fixed price quote online.

Your Worcester boiler will usually stop working when the boiler pressure drops too low, typically around 0.5 bar, but they will sometimes keep working on 0. Having your boiler regularly serviced is key to keeping it functioning at its best, ensuring it lasts longer and preventing any future issues. Boiler servicing also reduces your risk of carbon monoxide poisoning, keeping you and your family safe and healthy.This can cause the pressure gauge to move around so you don’t get an accurate reading but it isn’t a big deal. How do I increase the pressure on my Worcester boiler? Unfortunately, some idiot at Worcester Bosch thought it would be a good idea to use a key to repressurise their boilers. Do not open both filling loop valves fully straight away as the water pressure in the house might be too much for the boiler and cause the boiler pressure to shoot up too much. For most Worcester boilers, problems should be few and far in between. Something breaking isn’t necessarily a representative example of the brand’s overall quality — but it can still happen. If yours malfunctions, however, we hope that this guide has supplied enough information to get you started.