I need to follow this advice too. Three or four times this summer I turned on some old lady's AC, only to walk outside and feel the heat just "radiating" from that black cover from about twenty feet away. One time I walked out just in time to here it go POP and shoot off and blow down the road. Pretty amusing I must admit.
Originally posted by docholiday
Yep a board with a brick is fine. Some of the new covers breath better but once they get dirty, thats that. Just dont forget to take it off before starting the AC.