I recently acquired a Handskit T12A Desoldering Station like the one shown here
https://www.aliexpress.com/item/1005006011190635.htmlbut unfortunately, while the pump seems to run OK, the tip does not seem to heat up properly, and shows a low temperature and/or ERROR.
I reseated the tip in the handle a few times, and it warmed up OK once, but now has gone back to the behaviour above.
It is powered by a 24V wall wart, which shows an appropriate voltage on the display (24.3V). The person I got it from tells me that he inadvertently plugged the power supply into the pump switch connector (both are barrel connectors) which caused the pump to run continuously before realising his error and connecting everything correctly.
The menu system seems to respond as expected apart from the failure to heat, so the misplugging does not seem to have wrecked the control board.
Does anyone else have one of these units, and can suggest a solution?