Looks like it may have to replaced again
Leak in heater core. Replace core.
Sounds like your heater core has a leak and is causing steam to enter your air ducts. Does the steam have a coolant oder, if so, you will have to pull it and replace.
You need to check and/or replace the heater core
Replace the heater core. It is leaking.
Look for a leak in the heater/defrost system. Most times it is caused by a minor water leak in the heater system. Steve
Sounds just like a leaking heater core. See "Related Questions" below for more
replace the heater core, it most likely has a busted tube making the water heat and turn into steam whenever the heater or defroster is on. you may want to check the coolant level. after so long of the steam, or super heated water, escaping into the air duct system. you will obviously lose coolant level.
Those certainly are the key indicators of a leaking heater core.See "Related Questions" below - not only the one for the 1986-1995 Taurus/Sables, but read through the 1996-1999 heater core question - some of the information is relevant to the earlier generation too.Note: I've done this - my 1987 wagon - tough job, but certainly doable. Be sure to do your stretching exercises before starting - lots of contortions and bending.
you need to replace your heater core take the heater hoses off and lope them with a piece of tubing and drive you will see what i mean
A leaky heater core can do that. Also if the AC is not operative, the defrost mode can't dry the cabin air.
no.....the heater would have to be leaking
Front heater core is in the dash, the rear heater core is all the way in the back of the vehicle. If you have steam coming out of the dash vents, the front HC is leaking. If you have steam coming out of the rear heater vents, then the rear core is leaking.