I checked as advised. At least one of the connectors from the probe seems to have broken. The hair-thin filaments appears difficult to solder, but I will give it a try in the morning. Thank you for the tip! :-)
it was very difficult soldering job for me as well, but the job completed finally and the engine is running for two seasons now with the new mod
, but you have to make sure you do the soldering properly or the engine may stop in the flight and cause the engine to stop with the overheat -E- error, if you are not feeling confident that you can fix it then replace it to be in safe side