There dosn't appear to be sparking and no flame when switched on , tried pressure switch and new circiut board all to no avail. Would be grateful for any sugestions.
Thanks for that have checked but and they are both clean.
Anita
September 2009
check venturi in the boiler flue, you should be able to blow down both tubes ok and no back pressure, if there is on one take it out and clean out the blockage.
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