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 Benefits of Using an Ultrasonic Leak Detector to Find Refrigerant Leaks!
A refrigerant leak may be easy to find when the leak is a large one but when the leak is small, finding it can be tedious and time consuming unless the right leak dete...
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Ductless Mini-Split Step-by-Step Installation
In this step-by-step installation, we will be covering the full installation of a ductless Mini-Split heat pump system. This system happens to be a Cooper&Hunter D...
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What Components are in a Forced Air Gas Furnace? What do they Do?
In order to troubleshoot a gas furnace, the technician must have a thorough knowledge of each component that could be in the unit. Understanding how each component wor...
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Troubleshooting an HVAC Control Board? How?
Diagnosing if a control board is bad on a furnace, air conditioner, or heat pump may seem difficult but here are some simple tips and processes to make the job a littl...
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Clogged Liquid Line Filter Drier?
How can you tell if you have a clogged liquid line filter drier? If there is a noticeable temperature drop from one side of the filter drier to the other, this means t...
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Is There an Easy Way to Tell if a Mini-Split Ductless Unit is Low on Refrigerant? (Quick Tip)
Is there an easy way to tell if a mini-split ductless unit is low on refrigerant? Yes, if the Delta T is low and the system continues to run without reaching the desir...
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