The best thing to consider is to take your MBP to a local Apple retail store and tell them about the issue. If it is a hardware fault, they will either send it in for repair or if it is unrepairable, they should offer a replacement (be wary though as Apple will give you a refurbished one, not a new MBP, as I have previously experienced).
As others have pointed out, if the temperature goes over 100 degrees celsius, it will auto shut to protect the machine. Which model do you have?