Heater core replacement. on 1999 Ford F-150

Does the Air Condition have to be discharged as part of a heater core replacement? Does the whole dash have to be removed to replace the heater core?

by in Ormond Beach, FL on August 22, 2010
2 answers
ANSWER by on August 22, 2010
yes and yes,the evaporator and heater core are in the same plenum.
ANSWER by on May 14, 2011
On most cars,, except a lot of toyotas, you do need to discharge the a/c system in order to remove the heater core, because they are both in the same location. (the heater box, or sometimes called the evaporator box). Toyotas are designed in such a way that you can remove the heater core without removing the evaporator, (the evap box can be split without removing it from the car) All other manufacturers do not have this ability.
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how do you flush the heater core? while ideling gets warm. driving gets cold. has new thermostat, but will not get the cab warn at all.
my email is jrich48@insightbb.com R&R heater core on 1998 F150 4.6 W/AC
How much more will it cost to replace heater core if AC has to be evacutaed. I can recharge my system myself?

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