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Yes that picture is from another machine not the 250ci...

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No don’t have any similar parts on the 250ci board it looks like all are surface mounted...

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☹️ I will try and use some parts from other machines, to not have to spend a lot of money only time searching, testing, dismantling, etc, to try and fix it...

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I only found this https://youtu.be/Xd5wlWNMbEI

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Thanks but from Hobart or miller catalog, and we’re do I look for it¿ than you...

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I'm looking on the Hobart plasma for similar thermal switches but can't find nothing...

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In my other machine a miller plasma there's a thermal cut of switch on the inductor boost...

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Infra...

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Yes and the price shown is crazy !...

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https://youtu.be/zdh7_PA8GZU
https://youtu.be/hk2TfF1M4r8

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Thanks, I really don’t have super experience on electronics and all your saying is a lot of work and a lot of machines that sound expensive , it’s just sad that the less parts inside a machine the more scrappiest the machine, there’s no replacement parts no diagram it seems that they not care...

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Looking around more on the internet I found this video and maybe it’s the same concept use on the board ...

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Maybe I will try and design the board like in a cad program and try to understand better the functions of all the components...

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Thanks I tried the unit whit out the compressor and it does the same thing...

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I was thinking that it will be maybe the problem because of the relay in the board is in line with the compressor...

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I will look more in to this parts : maybe there use it on this board like a thermal cut out switch, this is what I found on the internet:

A thermistor is a type of resistorwhose resistance is dependent on temperature, more so than in standard resistors. The word is a portmanteau of th...

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Thank you so much Aeronca 41!

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