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This technical primer breaks down defrost control board operation, key components, and practical troubleshooting steps every HVACR technician should know. 

Heat pumps may be leading sales, but dual fuel systems are winning on trust, redundancy, and real-world reliability. 

The AHR Expo returns to Las Vegas and a newly expanded convention center in February. Smart systems, AI, electrification, and efficiency will be among the Expo’s key themes. 

By adopting ServiceTitan’s AI-powered Max Program across 27 businesses, Southern Home Services is betting automation will define the future of HVAC operations.

Heating, cooling, and humidifying air wasn’t new when Willis Carrier came on the scene. What was groundbreaking was the attempt at precise air control in a manufacturing environment. 

The 2026 AHR Expo Innovation Awards recognize 10 standout HVACR products chosen for their innovation, creativity, practical application, and potential market impact. 

Modern heat pumps are engineered for extreme cold, yet misconceptions persist. Field data and proper system design are changing how contractors approach winter heating solutions.

The new year kicks off with a high volume of increases across the board. 

If defrost isn’t working, something in the chain is broken. This step-by-step approach shows you exactly where to look and what to test.