Recommended · for beginners
How to repair cold solder joint
Why people recommend it
Often suggested for soldering help because it contrasts good joints with faulty ones and shows how to rescue a cold joint using heat and flux.
Watch for: The opening minutes cover cold joint repair
In their words
The first 2 minutes of this video demonstrate how heat and flux can be combined to remedy cold solder joints involving a PCB and feed-through pin.
st2000 on arduino.stackexchange.com, Apr 2023. CC BY-SA.