In recent years, some FDM 3D printer manufacturing companies succeeded in going beyond hotend temperature of 400°C to take advantage of new highly durable materials known as “super engineering plastic”. To accomplish the high temperature operation, the de facto industry standard is to employ the high-powered heater and liquid cooling system for their machines.A new high temperature hotend was developed based on completely different concept has been developed which does not require conventional cooling system to achieve 500°C level temperature. However, it is almost at the high end of the FDM processing temperature limit and extreme care was taken to develop the compact, self-contained, and eco-friendly and heating-on-demand hotend. We had high hopes for the new hotend not only from the industry viewpoint, but also from contribution to minimize global warming.However, we found a product life issue intermittently with the newly developed hotend. This report is on a novel approach to remedy the problem to extend the new hotend life longer, contributing to longevity of the high temperatures and stable operation with high reliability for 3D printing.