With a continuity tester , found on most, but not all ,electrical test instruments(voltage meter).
You go and buy a test meter - - we are not talking huge expense ! perfectly adequate mini-meters can be bought cheaper than $20 !
The heater blower may not be working properly. Without the heater blower working, the air will not come through the vents.
Have you checked you heater control valve or heater core if working properly.
A very common cause for heated seats not working is that the heater element has burned out on either the cushion heater element or the seat back element. The way the system is wired, if one goes bad, neither will work.- techJK ----------------------------------------------------------
Only the fan is working, there is no gas burning (gas heater) or the electric heating element is not working(electric heater)Answeris it electric gas or oil Its gas.
Check the coolant in the 96 Taurus. Check to insure that the thermostat is working properly, and that the water pump is working.
heater core stopped up, heater control vavle not working, controls under dash not working, low in coolant, theromstant, radiator not flowing properly, water pump.
if im not mistaken the heater control has vacuum lines. take off heater controls and see if you have a bad vacuum line to heater box.
The AC switch operates the AC compressor and should have no bearing on your heater function. If your heater is not working properly, you may have a weak thermostat.
Low coolant? Bad thermostat? Heater core plugged? Heater core airbound? Temperature control cable not adjusted properly?
two things to check, is the system charged and is the heater mix door working properly
either the thermostat is not working properly or you have air in the system
Blower motor working? Check coolant level System airbound? Bad thermostat? Control cable not adjusted or working properly? Selector switch not working?