If the vent was crushed, there is a good chance that the thermal fuse is blown. Unplug the machine, take a putty knife and pop the 2 clips (one on left and one on the right) between the top and front panel. Bust out your handy dandy meter and check your thermal fuse mounted back by the heating element. If it is open, buy fuse kit LA-1053. I think JW has got a good link with some great pictures of this.