Start by looking at the pressure gauge on your boiler, and make it a habit about once a month. Most systems should sit between one and two bar, and your heating manual gives the right figure for yours. If the needle has dropped into the red, it needs topping up.
Turn the boiler off first and follow its manual, as some filling loops are built into the boiler. Open the filling valve slowly and you should hear water flowing in. Watch the gauge the whole time so you do not overfill it. Once it reads right, close both filling taps fully, because leaving them slightly open can push the pressure too high.
Bleeding a radiator can make the pressure drop, so check the gauge afterwards. If it keeps falling, there may be a leak. Look around the radiator and boiler valves when the system is cold, as heat can seal small leaks for a while. A very small leak can dry before you spot it, leaving only a faint residue. Please leave loose or broken pipe joints to someone trained.
A boiler that keeps losing pressure has a fault in one of its parts. Getting it looked at early saves you topping it up again and again. Call me at Optimum HVAC as soon as you find yourself refilling it, and I will come out across Bexhill to find the fault. See how I handle boiler repairs and get in touch.
