maybe they should have replaced the icos/isar/istor with a good boiler and they wouldn't be in trouble. it's all the warranty stuff that must be killing them. pretty much every single icos/isar/istor i see has had or needs a new pcb, almost every single one under warranty.
heat engines corrode, condensate sumps block up or corrode through and combustion covers burn through. all common and well known faults. again mostly done under warranty.
heat engines corrode, condensate sumps block up or corrode through and combustion covers burn through. all common and well known faults. again mostly done under warranty.