I have a 2001 lincoln ls with a 3.9 v8 i have no heat in the cabin it only blows cold air at any temp. i put it at it does not overheat changed the aux coolant pump and dual climate control valve did the hvac test on climate control with no errors
Have it checked for a broken blend door actuator shaft.
SOURCE: Same issue in my Lincoln ls v8 where are my
where is the coolant temperature sensor located on a 2000 lincoln ls v8
SOURCE: 1998 lincoln Navigator --- 1. NOT
It can be the heater core but can also be the water control valve or the blend door actuator.
Please see my tip at http://www.fixya.com/cars/r6235876-no_heat_fan_blowing_cold_air . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info. First make sure your heater control valve on the heater hose is actuating properly when you change the temperature. The valve looks like the picture below.
If this is working, check the temperature actuator under the dash. If you system is cable operated, the cable sheath may have slipped the clamp. Make sure the door opens and closes all the way wheh the control is switched from hot to cold. If you have questions along the way, please let me know.
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Also had a new themostat put in as well
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