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Replacement parts for WHIRLPOOL RED4400VQ1 29" ELECTRIC DRYER | AppliancePartsPros.com
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is this caused from the faulty fuse?[/COLOR]
Cannot say.
You need more info.
I do not understand how the tech knew that the thermal fuse was no good.
Either it is a dead short (which is good) or an open (which means it has blown).

If they found it was blown then it should have been replaced ASAP as it is a critical safety device. The unit will not run with a blown thermal fuse if the part you are referring to is Item 7 in Section 3 or not heat up if it was Item 9 in Section 3 (thermal cutoff).
If they found it blown and just shorted the wires together because they did not have a thermal fuse then I would raise living hell. They put your life in danger.

If they did just short the wires then this could have contributed to the cord/receptacle damage as the unit could be pulling too many amps and the fuse should have blown to prevent this.
It would not be the only cause of this, if the connection in the receptacle was perfect then it should not have overheated and failed in this way but it definitely did not help.

You will need a new line cord.
Also a new wall receptacle and depending on the amount of damage (if any) to the wires in the electrical box you may need new wiring.

Any tech who would short out a safety device on an appliance should be severely reprimanded or even fired but that is just my opinion.

Note that the above assumes a lot so I am not even sure that any of it is applicable.