Question about 1998 Ford Taurus

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1998 Ford Taurus, heater won't blow hot air through any vent including defrost, coolant level is okay, no heat no matter how long car is run, car doesn't overheat, can't get warm air even if run at air conditioner with temperature selector on hot

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Common problem is the water resivor cracks up at the bottom... it appears that your water level is fine because the car doesnt over heat but i am willing to bet that resivor doesnt have water to the top. The radiator will hold just enough water to keep it cool. I replaced mine 3 times the sulution is doing to sound weird but go to the junk yard and get one off a murcury sable. dont know why but the sables res doesnt crack like that

Posted on Nov 08, 2010

  • Dave Fudally
    Dave Fudally Oct 19, 2014

    A cooiling system presure test will show whether the problem is a leak somewhere. If no pressure loss, most likely the blocked heater core/bypass area. note how 1998 coolent reservoirs in junkyards a have rusty brown mud like substance in them.

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Cheap easy fix. You don't need to buy new heater core!!! Faulty Ford design of heater core tubing into heater core. On passenger side heater core hose, it gets blocked where there is a heater core bypass. Simply buy a hard plastic hose from hardware store about 4 ft in length, 3/8 size or there abouts that will fit inside the heater core hose. Cut one end of hard plastic hose at sharp pointed angle. Remove heater core hose from top of water pump. Place hard plastic hose over length of heater core and measure how far in the hose it would have to go inside of heater core hose...to that blockage junction. Use magic marker on plastic hose to mark. Insert the hard plastic hose all the way up to blockage. Spin hard plastic hose like an auger to cut through blockage much like a plumber does a blocked drain or toilet!. Shove in further and further carefully past blockage. You want to be reaming the material blockage. Do this for 10 mins , rotating all the time the auger pointed edge hose...til you think you have cleared and hose goes to firewall/heater core entry. You can hold heater core hose upwards and pour in water or use garden hose to just blast in a little water, then hold hose down to drain. Put heater hose back on. If you have a Heater core Bypass that is rubber hose...you can temporarily clamp a vice grip on that bypass to force all water/antifreeze to pass through heater core. Add fluid if needed. Warm up engine. I actually do this each fall for 10 years...I leave small vice grip clamped on bypass hose with plastic ties to keep in place. That way most of hot antifreeze passes through heater core. You can also take to shop and have blasted out/ but I find this $2 cure works better.

Posted on Aug 26, 2014

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Clean out the heater core with high powered water hose. I have a 98 Ford Taurus and we have to do this every year before winter and we have great heat!

Posted on Aug 16, 2014

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Had the same problem with my Taurus, couldnt get any kind of heat or warm air.. It was the heater core.. Not a cheap fix but well worth it. Also its a pain to get to because you have to take the whole dash off...

Posted on Dec 28, 2010

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Bought son 98 Taurus, blasts cold a/c air and defroster air blows, but it won't blow warm air-no heater. can't see out of windshield with the morning sun.Husband flushed antifreeze and changed thermostat....


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