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Hi Steyn, it was the horizontal Omron chip on the right edge of the board in the image above, between the two sockets. It has six pins on the back and I noticed hairline cracks in all solders. They were not obvious. I could only see them with some magnification and the chip was not loose or anything. I resoldered all six of the pins to be sure and the dryer is still going strong.
I did look at the PCB using a cell phone camera on full magnification and noticed hairline cracks in the soldering of one of the relays. After resoldering, the dryer functions perfectly (used 4-5 times per week for over a month after repair).
ewan_mcbellbasher wrote:I had a recent fault with my AEG 61275AC dryer ~2 years old. It displayed error EH0 intermittently (and then the drum stopped) and the fault became more and more frequent. The fault seemed to sometimes come and go when moving the machine, so appeared like a loose connection. Eventually I traced the fault down to hairline cracks in the soldering of a relay very close to the mains inlet on the controller PCBA. I believe this relay is the “safety relay” referred to error code descriptions. I resoldered all six connections to this relay and fault was immediately resolved. So it seems as if ~2 years of operation had caused the hairline solder cracks, and nearly resulted in scrapping the machine. I would suggest always checking the PCBA for soldering problems when there are intermittent error codes; you need a magnifying glass to have a good look. Hope this may help anyone with similar problems.
I’m trying to troubleshoot this exact problem. Was the hairline crack on the power board PCB (on the side, near the rear of the machine) or the controller board on the front?
If it is the power board PCB, would you be able to identify the “safety relay” on the board (see image)?
