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October 12, 2025

Compressor Oil Overheat – What Happens When Oil Is Cooked To Its Limit

Ever wondered what really happens when compressor oil reaches dangerous temperatures? In this groundbreaking experiment, we push compressor oil to its absolute limit to discover the truth about oil overheat conditions.

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How to Replace a Condensing Fan Motor
Service calls about condensing fan motor failure are quite common. Even though fan motor replacement is a standard procedure for residential split systems, it requires careful attention to safety and detail.  This article will give you a step-by-step guide to replacing condensing fan motors. Along the way, we will also explain a few best practices […]
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Don't Get Depressed (Unless You're a Core)
This website is for professional HVAC techs and those actively learning to become professional HVAC techs, not DIY homeowners. I feel like that needs to be said before I state these seemingly obvious facts, but these very obvious facts are so commonly mistaken that they need to be covered. Take a look at the two […]
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Design and Performance Challenges of Air-Source Heat Pumps Across Diverse Climatic Conditions
This tech tip was inspired by Alex Meaney and Ed Janowiak’s session at NCI’s High-Performance Summit 2025: “Good Design Isn’t a Buffet: The Importance and Interconnection of Manuals J, S, and D.” Alex is a building science expert who worked at Wrightsoft (now MiTek) for several years before launching his consulting firm, Mean HVAC Consulting […]
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