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thanks.. i've just been trying to get a repeat performance, without success, if success is the right word.. i'm wondering how cpmplex these boilers are: how many information inputs and how much computer processing. is the water flow linked to the gas flow by a mechanical method or an...

i've looked in the archive, but can't quite find the answer... it's a worcester greenstar he plus boiler, and occasionally it overheats. the scenario last night was this: a bath being run upstairs [no problem when done on its own] + i started doing the washing up downstairs: so extra demand...