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Question:

What is an internal thermal fuse and what does it do?

I asked how to fix it, but was just told the same thing everyone else said, go to a mechanic and let them do it. I would like everyone to know write now that is my car, and I intend on learning everything I can about it, secondly I'm broke, and thirdly, i am a very poor grammarist.lol but seriously I would really like to know what this is.

Answer:

they are a section of thinner wire(usually encased in a glass or plastic case) that fails to protect the whole circuit or component when the temperature, voltage or current drawn rises too high, hence the name thermal. fixing it is easier said than done. do you know where it is? do you know how to safely remove and replace it? can it be removed/replaced? best bet is to get (buy, beg/borrow/ steal) the service manual for your car and read that first. if you get one, it becomes a handy resource for when you need to know stuff about the car. these manuals are made either b the manufacturers or other people who atually pull a car apart and put it back together, noting instructions and taking photos, so they are relatively easy to follow.
uuuuhhhhhhhhhhhhhhhhh.what!!!
Some components have an internal, non-replaceable fuse that melts open at a set temperature. The reason that temperature is used is that when an electrical component starts to wear out, More energy is required to keep it going. More energymore heat through the wires, and the wires are protected by fuses that melt when the power draw of the component exceeds their thermal rating, usually expressed in amps. The most common part that blows an internal thermal fuse that comes to mind is a Ford Airbag control module, and just replacing the module usually results in another blown internal thermal fuse. There ARE components out there that have a resettable internal thermal fuse called a circuit breaker. When the component draws too much power, the circuit breaker trips open due to excessive heat , then, when it cools down, it will reset itself. The most common component that utilizes a non-replaceable circuit breaker is a GM power window motor. usually it will go up a little ways, then stop and not work for a minute or so, then will go up a little more, then stop.This is the circuit breaker cooling down and resetting. Hope this helps.

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