This sounds like a Blend Door problem. The problem is that the blend door in the plenum is stuck in the A/C position and will not reposition to allow heat. There are two possible issues. 1: The Acuator has snapped off (plastic breaks) 2: The Blend Door is broken (plastic hinge broke) There are related articles to fix both of these conditions
2 radiator hoses / the top radiator hose comes from the engine thermostat / and the bottom radiator hose returns to the engine water pump
The thermostat is located on the front of the engine, between the upper and lower coolant hoses.
The thermostat is located on the back of the engine. It is located close to where the radiator hoses attach to the engine.
Have you replaced the thermostat? The water in radiator should not be boiling! ------------------------------------------------------------------------------------------------------ Is your cooling fan/viscous clutch working ? (Helpfull)
thermostat is located between the rad and the engine under the throttle body inside the aluminum thermostat housing which has two screws holding is together and three medium size water hoses come out of the thermostat Housing.Undo the three clamps holding the three hoses to the housing then the thermostat housing will come out,then unscrew the two screws holding the thermostat housing together then you will find the thermostat.
Waterpump, thermostat, radiator, radiator hoses.
your thermostat is inline with your radiator.. its in a junction coming off the bottom radiator three hoses plug into it.
Bad thermostat would be the first thing to check. After that, heater core. I tried replacing the thermostat. No good. I moved to the heater core. Diconnected the hoses and ran a garden hose into it to "flush" it and a bunch of black stuff came out. Hooked it all back up and works great. Not sure where the black stuff came from but it was apparently keeping the coolant from flowing and heating properly in the core.
The 5R55E transmission wasn't used until the ( 1997 ) ford Explorer , it is an electronically controlled transmission so there are no vacuum hoses In a 1996 Ford Explorer , with the V6 , the 4 speed electronically controlled 4R55E transmission was used , it also doesn't use vacuum hoses
The thermostat is commonly located on the front of the engine. It can be located where either the upper or lower radiator hoses connect to the engine.
$500 without the thermostat $750 with Thermostat $1000 with all hoses replaced
Normally the thermostat is located at the point where the upper radiator hoses connects to the engine.