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One radiator in my system doesn't heat up properly. It is warmish at the thermostat end and stone cold everywhere else. It's only about 7 years old, is there a way to determine if it's blocked at all? I can bleed it and water flows out. The return/pipe valve isn't closed. What's the best...

Hi, I'm after for some advice on a pressure issue with my boiler. It's a Saunier Duval Themaclassic F18E SB. When the heating switches on via timer the boiler won't fire because the pressure gauge is flashing showing only 1bar of pressure, the red light is also flashing. If I open the water...