Burning smell the dryer HE4 is only 1 year old and I am single so I do not do a lot of laundry. The last time I used the dryer last week I could smell something burning. The clothes dryed so I did not think anymore. Then I used the dryer again and the same smell and the dryer read PF and would not start up again. We did not have a power surge at all. After a while it did start up and I dried the clothes. When looking at cord the three prong plug was melted to the electrical box on the wall and there was a light brown going up the wall from the box.

Hello benson131,
Based on your description, you already identified the problem as being a bad power cord. There is a high probability that the place where that cord is wired into the back of your dryer that the terminals worked themselves loose. Loose terminals become resistive and do not allow adequate current flow to maintain dryer temp so more current is required and that additional current will cause the insulation to melt on your power cord. I suggest you do the following. First off, unplug that cord from the wall recpetacle. Determine if you have a 3 prong or 4 prong plug. Go to a local home goods store like Home Depot or Lowes to get a replacement cord set that matches the one you have.. ( probably cost between $10 - $15 ) Once you have the right cord.. pull the dryer out and away from the wall.. Locate the feedthru on the back of the dryer rear panel.. ( that is where the cord goes into the dryer) and usually has some kind of cable clamp to keep the cord from being yanked out of the dryer.
Loosen the cable clamp and then look for an access panel where the wires physically get tied into the dryer. Once you have the cover removed, you should see a terminal block with 3 or 4 positions and color coded ( red/ white/ black and or green.. ) the Green is a ground wire and may be secured to a frame stud and not on the terminal block. Unscrew the wires from the old cord and reinstall the new cord in its place. Make sure you match the colors correctly ( red to red, white to white,black to black and green to green if it has a green position of green to a frame screw.) Make sure these wire terminations are reasonably tight. Once together, put the cover back over the terminal block and make sure the cable clamp is snug. Then plug it in and run it.. Your problem should be resolved.
Let me know if you have any questions with this...
Regards,
Rick