273 Overheating

"Ok, maybe it's circulating too fast without the T-stat and doesn't have a chance to cool down. Put a new (tested in a pan on the stove) T-Stat in, functioning, still overheats."

Untrue but often repeated because people experience overheating after removal.

Read all of these:
https://stewartcomponents.com/index.php?route=information/information&information_id=6

Dispels many myths and provides lots of useful information.