My wife's 06 mountaineer is possessed...... The blower / fan for the hvac system will not shut off. When the digital thermostat is on - you can turn the A/C on or the heat on and the temp will change and everything on the display works like it should. The issue is that the fan stays on medium no matter what the display shows its on - and when you turn the thermostat off the fan then jumps to HIGH...... Anyone have any idea what this could be?
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