In this episode of “Taking the Temperature of HVAC,” Jamie Kitchen is joined by John Broughton and Jörg Saar to swap their strangest refrigeration and HVAC stories from the field—from diagnosing systems by sound and touch, to mystery refrigerants, water-filled chillers, oversized solenoid valves, and wildly improvised installations. Along the way they revisit old-school practices with legacy refrigerants, discuss how design oversights and poor evacuation procedures can wreck systems, and highlight what these “Stranger Things” taught them about troubleshooting, safety, and the evolution of best practices in the industry.