Fan controller took a ****, again!

Don't let the **** hit the.......aw, never mind :D

My friend bought a complete fan system which was a lot of China components. His temp sensor was defective after only a few days. He went out and bought a quality thermo switch and all's well.


I wonder...... are the temp sending units interchangeable? Id be down to buy a new high quality sending unit if thats all it took.