'92 Taurus Heater Issues
I have a '92 SHO with an EATC system, and the heater function works poorly and inconsistently.
Most of the time it blows cool air despite the temperature setting. I just happened to be under the hood recently while at a gas stop, and I felt the heater hoses and the aluminum outlet from the engine and they were fairly cool. Yet, a couple of days later I did the same, found that the heater hoses were properly warm and, turning the temperature up, found that the system was putting out heat. The next day the "cool" condition returned. It stays cool most of the time, even after a 35 mile commute.
The engine comes up to proper operating temperature (according to the temp. gauge, which has a new sending unit) and does not leak any coolant.
I will add that the air conditioning does not work either, but that seems to be a separate issue.
I have run the self-test on the EATC head, and no trouble codes are being set.
Is it safe to assume that there is no valve under the inst. panel on the inlet or outlet to the heater core that controls the coolant flow?
Thank you for any tips!
Deer Island, Oregon
By the way, my fiance and I just took this car on a near 3,000 mile road trip from Oregon to Colorado and back, first time on an extended trip in this rig, and it sure is a great open highway driver. Really good power considering the altitudes in CO.