Your fault could be with the PCB. It is quite a common part to go wrong on the Microns and the replacement PCBs have been modified, it is also best to replace the temperature sensor at the same time as in some instances the old sensors do not work properly with the new boards. Retailing at just over £200 the pcbs are not cheap so it would proberbly be best to get your boiler checked by a Corgi registered engineer. You can find Corgi engineers in your area with the postcode search @ www.trustcorgi.com
Robin S
August 2008
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