Q: My heat stop blowing all together.

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My ac doesn't work even after charging it but my heat always worked. Then one day the heat wouldn't turn off after I shut the car off and it dran my battery; so I unplugged it from the blower, and plugged it in whenever I needed to use it. But now the heat doesn't blow at all whether it's plugged up or not. What could this be?

My car has 158955 miles.
My car has an automatic transmission.

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