After doing a long and detailed research about this product i came around the following forum discussion...
https://www.reddit.com/r/AskElectronics/comments/5w62lk/max31855_is_this_aliexpress_failure_fixable/
looks like this was made for both chip 6675 and 31855 and thy have different pins description, T- in the 6675 should be connected to ground and in the 31855 should not be connected to ground... and I think thats why i'm getting the error!!
but if anyone made any modification please let me know until i get the real deal!! thank you
