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We have an old alarm system in the house, the panel is an Optima G3. Tonight the alarm box outside went off, no indication as to why on the panel. It wouldn't turn off by entering our code and so we've had to disconnect the alarm box. The system seems 'ok' apart from none of the sensors are...

Hi We've got gas central heating insurance and had an engineer visit today as we thought the pump had stopped working. However, he diagnosed a 'dry system' and showed me that there was no water in the upstairs radiators. He said that the dry system was caused by a blockage and that we...