avatar
Corey Cruz
No tags found

Tech Tips written:

Upgrading a Single-Pole Contactor with a SureSwitch: Using a Wiring Diagram
Along the path to becoming a great HVAC technician lies the dreaded wiring diagram. It's meant to be a helpful map of the equipment's electrical system, but with its crisscrossing lines and cryptic symbols, it often feels more like a barrier than a guide. If this sounds familiar, you're not alone. But what if you […]
Read more
Compressor Failure Diagnostic Checklist
Industry data shows that up to 40% of compressors returned under warranty have no fault found. Technicians often blame the compressor when another component is the root cause. This checklist is designed to help you definitively confirm compressor failure, saving time, money, and unnecessary replacements. Let's make sure it's truly bad before we cut it […]
Read more
Refrigerant Recovery Cylinder Fill Calculations Simplified
This tech tip was written by Eric Kaiser from TruTech Tools. Thanks, Eric! Filling refrigerant recovery cylinders is a task HVACR technicians perform regularly, but figuring out how much refrigerant to safely put into a cylinder can still be confusing. The challenge almost always comes back to refrigerant density or specific gravity. Specific gravity, also […]
Read more

Video guest:

Podcast guest:

Expansion Valves – What Does and Doesn’t Matter?
   This podcast features a lively discussion on expansion valves, particularly thermostatic expansion valves (TXVs or TEVs), with a panel of expert guests – Corey Cruz (a market refrigeration tech), Matthew Taylor (head of refrigeration service at Kalos), and Joe Shearer (with Precision Air Conditioning). The conversation kicks off by busting some common myths […]
Read more
Drain Cleaning – More To It Than We Think
Mike Klokus and Corey Cruz from Kalos come on the podcast to talk about drain cleaning. They discuss their tips and some best practices. Approximately 50% of the calls in the light commercial division have to do with drains, and drain cleaning is a common PM procedure. The procedure starts off when you pull the […]
Read more
loading

To continue you need to agree to our terms.

The HVAC School site, podcast and tech tips
made possible by generous support from