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 4. GQ Hot Air Soldering Rework Station
 5200 temperature suddenly out by 100ís degree
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Posted - 01/21/2019 :  17:14:32  Show Profile  Reply with Quote
I suddenly had a problem today. I use the unit in F. Today I started the hot air and it flashed C. I hadnít had a power loss or anything. I unplugged the main and turned the temp dial to set F. I plugged the main back in and F was now set. I turned the temperature knob to where I generally have it and it was climbing to well over 600 f and climbing. I turned it down and the very lowest setting is showing around 400 F. I tried the soldering iron and it is doing the same. I have unplugged and plugged it back in with the same results. I have also set it to C and it is way out as well. Any suggestions?
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427 Posts

Posted - 01/22/2019 :  11:43:06  Show Profile  Reply with Quote
Soldering iron starts at 400F so it looks ok. But for the hot air, the component T1 and T2 needs to be replaced inside.
See schematic in this thread:
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