Testing Electronic Boards in HVAC systems

Electronic control boards like the one shown may look complicated, but there are simple checks that you can use to troubleshoot them.

Some diagnostics include LED’s to lead you in the right direction when troubleshooting. Always give the board a thorough visual check, looking for burn spots and/or corrosion.

Excerpt fromGas and Oil Heating“, Preparing for the NATE Exam (Instructor Guide), available from the online store at the Refrigeration Service Engineers Society RSES.ORG

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