Sounds like the leads are shorted, or maybe the wires in the CW.
Do you have a multimeter to check the probe with?
If not, you could probably use some wire and a flashlight to create a continuity checker.
If the probe has the problem, send it back; if it is the machine you will need to "get into it".
With the probe unplugged, does the machine have an option to test the probe for "open"?
With it unplugged, it should state that if it is something the machine will report.
If I was more ambitious, I'd go downstairs and see, but my body is unwilling.
Ken,
V-1, 2, & 3
When the People fear their Government, there is Tyranny.
When the Government fears the People, there is Liberty.
- Thomas Jefferson
You must be the change you wish to see in the world.
- Mohandas Gandhi