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- 8 Mar 2005
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we have a Worcester Bosch boiler, 2 years old. It comes on for a few minutes and then the red warning light flashes, not sure what this light means. Got a plumber round who replaced the gas valve, and serviced the boiler, but the red light was still flashing.He seemed puzzled, so he referred to the manual, and seemed to make it Ok, but now it is happening again. Bolier works for a few mins then red light comes on. Plumber is coming again on Saturday, but this is getting expensive. Any ideas re the problem would be appreciated, so I am a little more savvy when he comes again.