Field Notes
Plain-language notes on components, circuits and how to read a schematic, written for people at the bench, not for a classroom.
Field Notes
The HVAC Interview: Preparing and Dressing for Success
Landing a job in HVAC is unique because every employer has a different philosophy on professionalism. For some, the goal isn't just to look good—it’s to look capable. ...
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How to Read a Tape Measure in Inches and Fractions!
When teaching students how to use and read a tape measure for the first time, I have a go-to set of items to facilitate the training. I use 13 pieces of wood with 26 m...
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Make Sure to Connect You Gauge Quickly To Prevent Contamination!
If you remove the vapor access port cap on a running air conditioning system, the low temperature brass on the inside of the port will condense water vapor from the ai...
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Do You Need Locking Caps On Refrigerant Access Ports!
After servicing or adding refrigerant to an air conditioning system, add locking caps to the service ports if the system is in an accessible area. This reduces the cha...
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Quickly Check For Condensate Clogs and Issues During no A/C Service Calls!
There are a number of factors that lead to a residential NO A/C service call, so make sure to rule out the condensate line/switches! These switches may be wired to bre...
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Seeing the TXV Metering Device Operate Using A Water Stream!
The purpose of this HVACR training project is to visually show your students the change in the amount of liquid flowing through a TXV or Piston Metering Device during ...
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