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Q: Ac blows hot only. Wat can it be? on 2001 Mercury Grand Marquis

Put on max ac still blows hot. Checked nd recharged ac nd its good. No leaks. Ac compressor turns on . I really need help figuring this problem out. Have a 3 month baby.please thank you
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Possible blend door actuator failed. Turns the HVAC from heat to the A/C side. Vent door is stuck on the heat side and is not switching.
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