Here you can register here for extended factory guarantee, which is 18 months or 5 years. This is free of costs, but registration should be done within 4weeks after receival. We began this program July 1st. 2013.
Factory Statistics: Replaced tubes on guarantee.
We publish the statistics together with this 5-Years program, as we started this in July 2013. We had a 12 months guarantee program before that.