Soldering best practices: heat the joint, not the solder

@solderpunk · Oct 6, 2026 · 2.6k views · via iFixit ↗

The wiki page I link in every thread where someone shows a cold joint. Temperature, dwell time, flux, and why your joints look like grey blobs.

#solder#soldering#technique

32 💬 11 comments

11 comments

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Can confirm, the cheap part is the one that fails. Replaced mine twice before reading this.

14
@solderpunk OP 13d ago

Should be the same procedure, the part moved slightly but the steps match.

0
@torque_tina 15d ago

Tried this over the weekend and it worked first time. Thanks for writing it up properly.

13
@benchtop_bea 15d ago

Followed along, got it done in about twice the time quoted, but it is done and it works.

12
@solderpunk OP 13d ago

Glad it helped.

8

Solid. Sending this to my brother who keeps asking me to fix his.

11
@applianceandy 15d ago

Nice. What did the whole thing end up costing you?

9

Can confirm, the cheap part is the one that fails. Replaced mine twice before reading this.

5
@solderpunk OP 15d ago

Should be the same procedure, the part moved slightly but the steps match.

0
@garage_gabe 13d ago

Would this work on the older model? Mine is about ten years older than the one shown.

4
@solderpunk OP 13d ago

Unplug it. Always. Takes two seconds and the worst case otherwise is a trip to the ER.

2

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