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you need a new control unit.

That is not always true. Check your codes on your control unit by pressing the Off button and floor bottom at the same time. Thsi will bring up your code or codes if any thing is wrong. (It takes about 30 seconds). Its sounds like your plenum door is stuck or the motor that controls it is faulty. Codes are 24 and 25. The next step would be to replace the plenum motor that controls the plenum door. Sorry to say this but its located under the dash which needs to be removed. Its about a 4 hour job for a novice and you will need instructions. Wish I could be more help. Check this out

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โˆ™ 2008-06-11 02:12:12
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Q: Why is there cold air coming out of the heater no matter where you place the Temp control?
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