It just cannot stabilize the temperature enough to start printing.
The line you see repeatedly (Txxx E0 Wy) is displayed only during the process of getting the hotend to the target temperature. The Wyy inhere is the estimated number of seconds before print starts. It should only decrease.
You might have some misconfiguration about temperature in your firmware.
Can you tell us what hotend you have, what firmware you run ? Changed anything recently in that area ?
Can you show us what your board replies when you send it a "M136" GCode ?
Then run a M303 to do a pid auto detection run (if you have a recent marlin - warning, will heat your hotend) and if the values are different from what M136 said, you might want to update them.
Most of my technical comments should be correct, but is THIS one ?
Anyway, as a rule of thumb, always double check what people write.
