# Disconnect negative battery cable # Drain the cooling system # Working in the engine compartment disconnect the heater hoses from theheater control valve # Remove instrument panel and the center console # Remove the heater controls and disconnect the heater hoses under the dash where they connect to the heater core # Label and detach the air ducts,wiring and controls still attached to heating unit # Unbolt the heating unit and detach it from the car # Remove the screws and clips and separate the two halves of the housing.Take out the old heater core and install new unit
The price of the heater core is around $50. The labor costs to replace it can be as high as $300. This is a very labor intensive job.
possible leak in heater core.
Probably the heater core, it is a beast of a job to do, but is gratifying to say the least. If the is a smell of antifreeze you can almost bet it is the heater core.
sounds like your coolant lines, heater core, or both needs replaced. i just replaced the heater core in my truck with the same problem
sell it
chiltons auto repair manual
I have a 1993 ford f250 and just replaced my heater core by just taking out the glove box. I believe it is the same on an 88, although it is a little tight. Once you take the glove box out there should be a black cover over the heater core, just remove that. Next open the hood and disconnect the two hoses going into the heater core. Now the heater core should just pull out. Do the same in reverse to put the new one in It is pretty simple, but in some cases you may have to take the dashboard off, which is a pain. Pretty sure on an 88 f250 you be able to go it through the glove box.
Figure 41: Heater Assembly Component ViewHEATER CORE REPLACEMENTRemove Or DisconnectEngine coolant.Heater hoses.Refer to "Heater Hose". See: Heater Hose ReplacementInstrument panel.Refer to "Dash Board" under Body and Frame / Interior Trim. See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument PanelRear case screws. (88)Rear case. (96)Screws. (94)Straps. (93)Heater core. (92)Seals. (89 & 90)Install Or ConnectSeals. (89 & 90)Heater core. (92)Straps. (93)Screws. (94)Rear case. (96)Rear case screws. (88)Instrument panel.Heater hoses.Engine coolant.Check the system for leaks.
The heater core may be stopped up. Try flushing it, or replace it.
No
Under the dashboard, behind the glove box, same place on all troopers...
No