Is it normal for a soldering iron to turn red?
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 Jun 12 2025, 05:52 PM
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#1
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Senior Member
3,655 posts Joined: Oct 2010 
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For quality soldering iron no, for this type of cheapo soldering iron yes.
Honestly i would recommend get a proper china brand soldering station than using this. You are going to have a very, very tough time getting any proper soldering done with this cheapo tool. |
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Jun 12 2025, 11:39 PM
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#2
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Senior Member
3,655 posts Joined: Oct 2010
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QUOTE(mowlous @ Jun 12 2025, 08:12 PM) I am presuming you don't have a voltage regulator and you just plug and play. Regular socket wall produce 60w and above. Your cheap solder is running about 35 - 40w range. W/O a regulator it's just going to keep heating until it melts. Using voltage regulator is not going to solve the problem here. |
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Jun 12 2025, 11:44 PM
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#3
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Senior Member
3,655 posts Joined: Oct 2010
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QUOTE(ozak @ Jun 12 2025, 09:30 PM) yes, the solder iron have problem. If you teardown before these type of cheapo solder iron you will know there is no thermal cut off switch.The thermocouple inside should sense the temperature and cutoff when reach the desired temperature. But your wan keep running till become red. That’s too high temperature. The handle will get hot and the tip will oxidise fast. |
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