Ryan31,
Using the PCV on M1000's is wildly popular all across the globe. Like many have mentioned, they like to run cooler and must fuel precisely at those troublesome Hot areas.
If the outer cover on you box is slightly burned, investigate the burned section for any grayish material or greenish silicon circuit board portions. This would indicate that the melting went through the enclosure and into the board. If the area remains as a black plastic material, you would be fine.
A quick and easy test is to plug the unit in, start the sled, and watch for two LED's to dance upon startup from red-green, then go solid green once running. This is normal operation and the PCV is good to go.
~T.J.