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
ECM Fan Motor Troubleshooting for Constant Torque Motors: X-13 and Broad Ocean
ECM “constant torque” fan motors can be easily identified by noticing their spade terminal plug ends. However, make sure to read the motor's rating plate to verify thi...
Read more →
The Directional Flow of Refrigerant in a Heat Pump During AC Mode (Quick Tip)
(This image is courtesy of our friend JD Kelly @student_of_hvac ) In this refrigerant flow diagram, we see a simplistic piping arrangement for a heat pump running in c...
Read more →
Simple Low Voltage Thermostat Wiring to Control an Indoor Blower Motor (Quick Tip)
(This image is courtesy of our friend JD Kelly @student_of_hvac ) This drawing shows how a low voltage wiring circuit can control a high voltage, high current load, su...
Read more →
HVAC Training For Thermostat Operation, Wiring, & Multimeter Use!
This short project is designed to show how to teach thermostat operation and wiring to a newer HVAC technician or a student in a mobile and easy to understand format. ...
Read more →
10 Methods to Clean Condensate Drains/Traps on Air Conditioners
In this article, we go over 10 methods to clean out condensate drain lines and traps on air conditioning systems! The condensate drain line is responsible for removing...
Read more →
EEV Electric Expansion Valve Training Project
Explaining how an EEV operates is much easier when you can show exactly what is happening, each step of the way. This project is meant to simplify the operation of the...
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