Did they send you the probe with the extra ground wire attached? I have had both and they both failed multiple times!
No they are not wanting to replace mine at all first one too... D-MAX Store is fighting the good fight I am not the only one that they have in line with this fight... As far as I am concerned there is plenty of evidence on this thread alone that the problem with their probe and not with their customers. I have yet to personally enter this fight, so far I've left it in the vendors hands.