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
Why a Start Capacitor Fails and Testing!
What causes a start capacitor to fail, and how to test one correctly.
Read more →
Copper Tube Swaging and Deburring Tools!
The tools used for swaging and deburring copper tube, and how to get a clean joint.
Read more →
Suction Line Accumulator Tank Function, Location, & Purpose
What the accumulator tank does, why it is used, and where it sits in the system.
Read more →
10 Reasons a Blower Fan Won't Start in a Furnace, AC or Heat Pump
The ten most common reasons a blower fan does not turn on. A blower motor may be installed in a forced air gas or oil furnace, air handler, or packaged unit.
Read more →
Top Ten Interview Tips to Land that HVAC/R Job!
Good training and experience matter, but the interview process is what lands the job. Ten tips for presenting yourself well, whether or not you already have HVACR expe...
Read more →
Where To Find R-22 & R-410A Leaks on AC Units! Top 10 Spots!
This article covers the ten most common locations where a refrigerant leak may be on an air conditioning system. An electronic leak detector is typically used to find ...
Read more →Electronics, in plain language.
Occasional notes on components, circuits and projects worth building. No hype, unsubscribe anytime.
We never share your email.
Read it at your own bench first.
Then decide.
30-day money-back guarantee, free shipping