You Blocked the Hole while Soldering？Fix it.
WHAT THIS VIDEO COVERS
This video addresses a common PCB soldering issue: through-holes blocked by excess solder, preventing component pins from inserting properly. It presents two practical fixes that restore clean, open holes without damaging the board.
The first method uses a dedicated desoldering tool for fast, repeatable results — simply heat and trigger to suction out the solder. The second manual approach employs a soldering iron and solder sucker: reheat the joint, add fresh solder to improve flow, then extract while fully molten. Timing and controlled heat are critical for clean results.
These techniques help maintain manufacturing flow during PCB prototype troubleshooting and PCB assembly rework. Proper hole clearing prevents assembly delays and supports reliable connections in multilayer and through-hole designs.
The guidance is valuable for high-reliability applications such as automotive PCB, industrial control PCB, and medical devices PCB, where clean through-hole preparation directly impacts product quality and yield.
KEY HIGHLIGHTS
- Use a desoldering tool for fast, clean removal of excess solder from blocked through-holes.
- Manually clear holes with a soldering iron and solder sucker by reheating, adding fresh solder, and suctioning while molten.
- Proper technique leaves open, undamaged holes ready for component insertion without risking pad or trace issues.
FAQ
Q1: How do you clear a solder-blocked through-hole on a PCB?
A1: Heat the joint and use a desoldering tool or a soldering iron combined with a solder sucker to remove the excess solder while it is fully molten.
Q2: What is the best way to unclog through-holes without specialized tools?
A2: Reheat the joint with a soldering iron, add a small amount of fresh solder to improve flow, then use a solder sucker to pull out the molten solder.
Q3: Why does excess solder block through-holes during PCB soldering?
A3: Too much solder or poor technique during through-hole soldering can completely fill the plated hole, preventing component pins from inserting properly.
Through-hole blocked by sodder?
Now your pin just won't go through.
Too much sodder and the hole is completely clogged.
Two quick ways to fix it.
Fix one, use a desoldering tool.
Heat it up, trigger, and clear the hole.
Fast, clean, and repeatable.
No desoldering tool? You can still fix it manually.
Use a soldering iron and a solder sucker.
Reheat the joint, add a bit of fresh solder, then pull it out.
Timing matters, pull while it is fully molten.
Both methods work, one is faster, one is more flexible.
End goal, a clean open hole.
