Burned board: has the board failed?

Описание к видео Burned board: has the board failed?

This one addresses a situation I have seem over the years. The burned spots on furnace control boards used on furnaces. Is this an indication of a component failure?
This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. If you have suggestions or comments they are welcome.
If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. Know your limits.

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