Simply disconnect the heater hoses going to and from the heater, (Inlet & Outlet) at the firewall. Purchase the proper size hose coupling that will allow you to connect the 2 hoses together. Do not plug these hoses, just connect them together. The coolant will now not flow through the heater core.
If you bypass it correctly you will just no longer have any interior heat. Simply disconnect the heater hoses and connect them together. Connect the Inlet hose & Outlet hose going to the heater core together using a connector that you can purchase at most auto parts stores. By doing this you are simply routing the coolant away from the heater core. WARNING: Do not plug either of these hoses!!!!
heater core hoses not hot
No
Try flushing the coolant system out
what is the year model? 1995
Is there any difference in replacing the heater core in the 2002 as opposed to an earlier model such as the 1997 ?...or is it pretty much the same job ?
Look up under the passenger's side dash close to the kick panel, and you will see a heater case. there on the front is a removable cover, held on with several 7mm screws. Remove that cover, disconnect the heater hoses under the hood, and replace the core. Reassembly is in reverse order of removal.
on a 1993 4.9 it is just to the left of the thermostat where the radiator hose and heater core hoses go into the thermostat it has a couple of wires running into it.
Your heater core might be clogged or otherwise inoperable. Videos for unclogging a heater core can be found quite easily on Youtube.
To change the heater core in a 87 ford f150 is easy. Just remove the glove box and then behind it there is 7 bolts. After you remove the 7 bolts then just remove the cover and behind it is the heater core. By far the easiest heater core I ever changed.
Burried behind the dash on the passenger side, good luck.
There are several common heater problems for a 1997 f150. A stopped up or leaking heater core, bad thermostat or clogged up blower fan housing all can cause heat problems.