the heat blows out the defrost when it should blow out floor vents only
heater control valve is bad on the drivers side.
My ac blows only in the defroster and not any of the other vents i have 98 ford windstar 3.8 v6
that is the default mode for the hvac, check vacuum line on passenger side of motor, comes for the strut area over to motor, main vacuum hose for system, mine had come loose
heater on at idle and will not blow warm air. when moving it blows the warm air from the vents. what will cause this
In a Ford Freestar, the heat typically blows from the dashboard vents rather than the ceiling vents. The vehicle's heating system is designed to direct warm air through the front vents to provide comfort for the driver and passengers. If you're experiencing issues with airflow or heat distribution, it may be worth checking the HVAC system or consulting a mechanic.
look for a vacuum leak in hoses operation air doors
If it blows only out the defroster vents : then check for Vaccume leak Rick ASE L-1 Master TransMichigan.com
This happened to mine every year for 4 years. First few times it was a hose to the compressor, last time it was the actual compressor that had to be replaced...bought it on Ebay for around $300
If it still blows cold when it is at running temp, check the engine thermostat, its probably stuck in the open position.
Air blows from defroster vents when the heater is on because the vehicle's heating system is designed to direct warm air to the windshield and front side windows. This helps to clear fog or ice and improve visibility. The defroster function activates a specific mode in the climate control system that prioritizes airflow to these vents, ensuring that the driver and passengers have a clear line of sight.
why dont bottom vent doors not open on 2001 gmcsonoma