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HVAC School title: HVAC and Refrigeration Free Training

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The photo above is of a real condenser coil we cleaned. The outer fins looked OK, but dirt and lint were packed deep inside. We also had sky-high head pressure and condensing temperature; those are telltale signs of an impacted condenser.

That situation illustrates that a coil can sometimes look OK at first glance but may still need to be cleaned. A ...


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In my recent classes with my employees at Kalos, we've been going over finding target pressures and temperatures for an air conditioning system. The goal has been to get techs to have “target” readings in mind before they start connecting tools. This step is an important part of being able to “check a system without gauges,” as we have talked about so often. M...


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One aspect of motor selection that can get overlooked is motor bearings, and it can have big consequences.

Sleeve bearings are most common in residential and light commercial applications because they are less expensive and quieter. They don't have rolling “balls” but rather rely on a thin film of oil on metal sleeves.

Sleeve bearings work ...


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All fuel-burning appliances require oxygen to burn. They require sufficient oxygen to burn cleanly and safely, without soot and CO (carbon monoxide). I see many open combustion furnaces jammed into tight closets and mechanical rooms with little thought or planning regarding combustion air.

I live and work in Florida, where most of our fuel-burning appliances are 80%...


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An informed customer can make our job easier. When someone understands what they’re asking for, we can have a better conversation about what’s possible and what isn’t. Most customers who research a problem, including those who use AI, are trying to understand what’s going on. They’re willing to hear what they may have missed.

Then there’s the customer who has alread...


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