Let's try this again.
The F4-08THM is a totally different module that is much newer and acts completely different than the F4-08THM-J. It has bits for burnout, etc. The F4-08THM-J does not. I am 100% sure on this.
If the module is shorted you will get ambient temperature. I am 100% positive on this.
If the module is in burnout you should get a reading of 8000. This I am reasonably sure of (90%+), but I don't have a module at hand to test with.
This should be fairly easy for you to test.