Failure to defrost coil

The new part looked exactly like the old part which some said the old part had no cover. This new one did. As with some, it was not necessary to pry with a screw driver to remove the top shielding. It was only necessary to push backwards and it came down. The rest was just a matter of removing two screws holding the defrost/timer to the top, replace it (re-install cable), and screw it back to the top, replace top, and set the thermastat. Finished!