No heat air is blowing cold - 1998 Ford Taurus

in it and leaking pressure. If cracked get a good one from junk yard or auto store. If ok. 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. in it and leaking pressure. If cracked get a good one from junk yard or auto store. If ok. 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.