I have an intermittent problem with our mini c28 boiler it will come on a go of by itself any ideas?The Green light is flashing as normal.It had a new expansion vessel fitted 6 months ago.
Changed the temp sensor for the central heating,found a loose connection on a connector between the control and ignition PCB also four resistors on the ignition PCB with multiple dry joints,resoldered.Fault not happened since.I expect it was one of these causing it
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