The cost to remedy a blue light flashing on a Worcester boiler can vary. Common issues, such as a faulty gas valve or printed circuit board problems, might arise. To replace a gas valve, prices generally fall between £180 and £220, inclusive of labour and materials.. Worcester Bosch 24i flashing reset and blue lights. muffinek Posts: 134 Forumite. 26 February 2023 at 5:54PM. Hello. I woke up this morning to no heating or hot water. When I checked my boiler both red reset light and blue lights were flashing. I restarted it and it attempted to run for few minutes and then both lights started flashing again.
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May 3, 2022. #1. Condensing boiler installed by local Gas Safe plumber in 2014, not combi. Failed a couple of weeks ago with flashing blue light which googling suggests means no gas, blocked flue or blocked condensate pipe. There is gas, the flue is clear, and the condensate pipe goes into the under-sink waste pipe.. So to re-cap. 1) Check pressure gauge is reading between 1 and 2, if not, top up system, bleed rads, reset and fire boiler by the method I described earlier. 2) Undo condensate pipe, drain do up, reset and fire up combi by the method I described earlier. 3) Thaw condensate pipe by the method I described earlier.