My Chillblast PC suddenly started overheating after three and a half years of use. The problem was that the pump in the CPU watercooler had failed. I contacted Oliver at Chillblast, and he arranged for my PC to be collected by DPD and taken to MendIT for repair. (The PC was still within its 5 years labour only warrenty, the 2 year collect and return warrenty having expired.) It was received by Tomasz at MendIT, who initially found that the waterpump was working again! DPD must have jolted it into operation again. Tomasz left the PC working over the weekend, and the temperature lept up to 100C. Oliver had previously recommended that the watercooler was replaced by a Bequiet Purerock2 Air Tower Cooler, which I suggested to Tomasz. He checked that this cooler would be powerful enough to dissipate the power from my PC, and asked his admin team to supply a Bequiet cooler. When the cooler arrived, Tomasz fitted it and tested the PC. The PC was then carefully packed and returned to me, and it has been working fine for the past week. Thanks to Tomasz at MendIt and earlier Oliver at Chillblast.