2002 Mercury Sable Q&A

2002 Mercury Sable Question: no heat

Cold air blows out of the vents when I place the knobs on any selection to receive heat(ex defrost/feet or heat to blow out on face/feet) Why I do not get any hot air but the AC works? -
Answer 1
You may have a thermostat that is stuck open, or a blend air door in the dashboard that is not functioning properly. -
Comment 1
It could be A malfunctoing actuator vaulve controling hot water intering the heater core. The actuator runs of vacum pressure, checking the vacum hoses would be a good place to start diagnoses. -
Answer 2
i had the same problem. My mechanic cleaned out heat pump and changed coolant. works great now -
Comment 1
theres no heat pump on a car its a heater coil -
Related Items:
What would be the problem if your heat is not heating up the car but it blows cold air.
replaced hvac actuator, thermostat and anti freeze A/C works fine for now however, i get no heat
WE ARE EXPERIENCING A OVER HEATING PROBLEM WHENEVER WE USE OR AIR CONDITIONER BY SETTING IT ON MAX (WHICH MAKES IT HEAT UP FASTER THAN AC SETTINGS. bY NOT USING THE A/C OUR CAR DOES NOT OVERHEAT A...
Original owner, 133K miles, flushed system every 50K--Engine is Overheating after 10 to 15 mins...
The temp gauge fluctuates.Sometimes it want come up to normal temp even after its been run awhile. Other times it will go to normal temp.But when you turn on the heat it will drop out. I have chang...