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I'm at my whits end with my heating system, as soon as I fix one problem another appears! I have a Biasi condensing boiler, in charge of heating 9 radiators. I have managed to balance the radiators to the extent where the house now heats up slowly but evenly. The problem I have...

Is it possible to replace the strobe within alarm boxes easily? If I stand next to it and run a test with the veritas R8 keypad, within the external box I can hear the electricity trying to flash the strobe but there's no light. I have no idea what sort of alarm box it is, has no brand or...