1999 Ford Taurus 3.0l EFI 6cyl, Heater does not work, only blows cold air, have already flushed the radiator cooling system, and installed a new thermostat, still cold air. Anyone's help will be Greatly Appreciated! Thanks!

What have you checked so far ?
Radiator full of coolant ? Heater hoses getting hot ?

Sounds like temp control valve is not working properly, or there is air in the cooling system, or the cooling sytem needs to be flushed. First thing to check for is air. Is the coolant level low? Also look in top of radiator while engine is cold and running to see if the coolant is moving and does it look dirty/sludgey.

unless it is the heater core which you should flush system,,i always boil my new thermostat to make sur it compresses

Hi Ron,

Blend air door actuators fail often in Ford Taurus. It sounds like that may be the problem with yours. For more information regarding this subject, please read the following article:

Why Is My Hater Cold?

flush the cooling system, probably clogged. happened to me a bit ago with a 99 cherrokee. hope it helps ya.

first check to see if your heater hoses are getting warm you may just have a bad thermostat, if you've had any recent work done to the cooling system you may have an airlock which does not allow any coolant too flow through the heater core. do you smell antifeeze ?

have you recently replaced your waterpump ?

yes this is very likely the problem, have you check your cooling system is it rusty? if so the heater core is plugged, take the inlet and outlet hoses off the core at firewall and use a garden hose to clear it, then have the cooling system flushed if rusty.

Have the cooling system flushed or remove the hoses from the firewall(when cool) and blow out heater core with compressed air-clogged heater core..

the heater core is probably bad and costs about 45.00 at the auto parts store.