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is it possible to replace the programmer on a myson 40b apollo boiler with a cheaper alternative i have been told the genuine item is £150 would be very grateful for any thoughts

can anybody help whenever i try to turn my myson appollo 40b onto continous it blows the 3a external fuse cheers

hi hope somebody can help i have a myson apollo 40b boiler & the external 3a fuse below it keeps blowing,to outline what i have done to the system,i wasn't getting any hot water unless i switched to ch & hw on the boiler i was told that this was probably the motorised valve so i replaced that...