THIS IS OFTEN CAUSED BY A LEAK SOMEWHERE IN YOUR SYSTEM TRY ADDING A LEAK SEALER INTO ONE OF YOUR RADIATORS . TURN OFF THE VALVES ON BOTH SIDES OF YOUR RADIATOR WHEN THE SYSTEM IS COLD REMOVE THE BLEED NUT ( BEST ONE TO USE IS OFTEN A TOWEL RAIL BECAUSE THESE ARE OFTEN ON THE TOP OF THE RADIATOR PIPE MAKING IT EASIER TO ADD THE LEAK SEALER ) ADD THE LEAK SEALER REPLACE THE BLEED NUT TURN THE VALVES BACK ON TURN YOUR HEATING ON ABOUT 25 DEGREES AND RUN FOR BETWEEN 4 AND 6 HOURS . CHECK THE PRESSURE AND SET TO THE BOILER RECOMENDATION . THIS MAY NEED TO BE DONE A COUPLE OF TIMES , ALL THE BEST [/code][/b]
When you let air and water out of your radiators, you automatically lower the system pressure. There should be a tap under the boiler where you can let in more mains pressure water to bring the system up to 1 bar.
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