my isar M30100 is flashing the code 3H dog as bitten up our user manual anyone have any ideas. We now have no heating and blinking no fire either, grrrrrrr
should be about £25 but you may need to get the serial number off the boiler as there are possibly two different versions available
Paul the Gasman
February 2010
Thank you so much Paul, is this a expensive job, how much roughly is the part, a member of the family is going to do it hopefully so probably only looking at cost of part.
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Try fixfault.com to fix home heating systems.