During May 2025, Dirk Mueller focused on stabilizing the Coolix IRac fan-only mode within the arendst/Tasmota repository. He addressed a sequencing issue in IRac.cpp by carefully reordering the mode, temperature, and fan-speed calls, ensuring correct fan speed assignment and improving the reliability of fan control. This targeted bug fix was implemented as a minimal, well-scoped patch, reflecting a precise approach to firmware development. Working primarily in C++ and leveraging his expertise in embedded systems and IR remote protocol handling, Dirk’s contribution reduced user-facing misbehavior without introducing new features, demonstrating depth in diagnosing and resolving nuanced control logic issues.