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Circuit Board Diagnosis Basics
In this unedited episode of HVAC School, Bryan and Nathan talk about some basic rules for circuit board diagnosis.
So, circuit boards are boards with circuits in them. They come in two types. The traditional printed variety contains switches, relays, and resistors. The other type contains silicon chips and uses logic and processing inside the boards. You may notice these in some high-end commercial systems (EMS), but we rarely see them in residential HVAC.
The diagnostic challenges come in when technicians are unfamiliar with what's on the circuit board. It helps to break it down and look at…
The skinny
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