Cannot tell from the question if the problem is:
See "Related Questions" below for coverage of both
thermostat may be stuck open so engine doesn't get hot enough to blow warm air. Had the same problem on a Taurus once
Temp blend door malfunction.
it might be the starter. have it checked out.
If your 1997 Ford Taurus won't go into reverse, there may be a problem with your transmission. You can try checking your levels, but you need to take it to a mechanic.
Pull it out and fit a new one
Why wont my 1994 Ford Taurus GL 6cyl Auto transmission shift into third(high) gear. It will only reach speeds of about 35mph +/-
If it blows only out the defroster vents : then check for Vaccume leak Rick ASE L-1 Master TransMichigan.com
somtimes a mouse moves into the blower motor and makes a nest ?
get a new window switch
If you are talking about the thermostat in your engine, the two have nothing to do with eachother. If there is no air at all coming out the vents, I suggest it is your blower motor.
as far as i know the wheels on the Taurus are 5 lug and the escort is 4 lug, so no it wont work
Reset it in the trunk to turn on or unplug it but your fuel pump wont work