Error

[klpf]

Hello,

whats wrong ?

[RavensFan]

Did you hover over the broken wire with Context Help turned on?  That will give you a clue.

Spoiler

You have 3 things wired together, and they are all data sinks.  I don't see a data source!  That Fahrenheit is an indicator when it looks like it should be a control.

[altenbach]

In addition to the missing data source, there are many other things that are wrong, such a complete ignorance of data types. I strongly recommend do start with a few basic LabVIEW tutorials. There are plenty of learning resources listed at the top of the forum.