First check your fuses. Next check your fan to see if it is working and if the wires are hooked up. The fan is located in the engine compartment on the passenger side. If the fan tests good it is your heater relay located on the heater core cover or the fan switch on the heater control. The heater control is in the passenger compartment.
The fan switch will usually work on at least one setting.
The thermostat could be stuck closed. the heater core could also be plugged or the door closes when you use ac and opens when you use the heater may not operate.
Because your thermostat is probably stuck open
Leave it turned off.... doh
Low Coolant? Bad thermostat? Heater core plugged or restricted? Heater core airbound? Heater control cable not working?
It could be the thermostat on the engine. If the engine does not warm up adequately the heater will never blow hot air.
Most likely the bad news that you did not want to hear. The heater core is leaking coolant.
heat core. leak. thermostat. no antifreeze.
heater will not blow on a 1996 ford contour
if the heater does not blow out warm air change the setting.
your heater core hoses could be plugged up and not letting much hot anti-freeze into the heater core then when you try to blow alot of air through it it cools the warm air off too much and you get not so warm air. try a cooling sytem flush
It is either your water pump or your thermostat
replace heater core and or themostat Coolant level may be low not allowing hot coolant to circulate properly, check coolant level.