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Hi, My Worcester 28cdi has recently developed a problem. Hot water runs hot and cold, when first called it heats up nicely and runs for a few minutes before running cold for 10 - 20 seconds before warming up again for a minute or so before going cold again and so on. Whilst this is happening...

Hello, I have an Ideal isar M30100 combi boiler that has up to this morning been functioning perfectly. This morning the timer switch, an electronic Lifestyle LP111, was showing that the heating was on but the rads were cold and the power light on the boiler shows as on but this is the only...