What is your question?
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What is your question?
Hot air constanty running can't turn hheat off
How long has your 2007 Mercury Grand Marquis had this problem?
2 months
1 Reply
Hello, if there is a concern with a blend door, the dash will have to be accessed to get to the actuator or heater plenum. However, i would suggest testing be performed. If the concern is not directed hot or cold air flow, perhaps the blower speed controller could be a concern? Or other areas of the ventilation system?