Question about 2000 Ford Explorer

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No AC in my 2000 Ford Explorer

Took 2000 Ford Explorer to dealership to replace heat core. I have heat now -- no AC. Note: the AC was working fine before I took the vehicle for service. The technician told me there was a leak. They tried using dye??? but cannot find the leak. I was told to come back when the weather breaks? Don't ask -- I have no idea what that meant or what sense it made. I will be returning to the dealership. More freon was added and tested to insure I had some air before I left that day. Right now no AC. Question: is there a connection between the heat core and the AC? when you are replacing a heat core does the freon need to be drain and the unit removed to get to the heat core. is it any way possible the mechanics could have accidently punctured the AC unit while trying to replace the heat core?

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The cooling system in a car is pretty simple. If you have a clog in a hose or elsewhere you are going to have an overheating problem. The water has to circulate to keep the engine cool (Cool to the engine would burn you). Now we divert some of this water to another radiator inside the dashboard and blow air across it ... voila Heater! That said if you put your heater on defrost and you get steam on the windshield you have a leak in the Heater Core (radiator in the dash) or in the AC .You lack of COLD can be caused by 2 things 1. No hot water in the heater core ( most cars have a bypass if this becomes clogged so that you don't blow up the engine) 2. The heater vent controls are not working correctly. Make sure that when you change the control setting that the air flow changes correctly. There is a flap in the heater box that changes from heat to A/C. If that is not working correctly it may stay on heater core all the time. If it is the hose and heater core clogged back flush the heater core. If you do this replace the heater hoses. I would also verify that the thermostat is there, installed correctly or may be its faulty, and its blocking the AC to get started. Flush and thermostat are do-able.
also Check operation of radiator fan. A partially plugged radiator may be causing your problem. Replace radiator with new, and your heater core may be partially plugged also.
and yes for your question ,that while replacing heater core ac unit is also have to be removed
as this is the procedure

1. Remove instrument panel and lay it on front seat.

2. Remove A/C evaporator housing as outlined.

3. Remove vacuum source line from heater dash panel seal (18529).

4. Remove heater dash panel seal from heater core tubes (refer to Heater Case Assembly).

5. Remove four heater core access cover retaining screws and remove heater core cover (18B300) from A/C evaporator housing.

Heater Core Access Cover Retaining Screws

6. Lift heater core and seals from A/C evaporator housing.


1. Transfer three foam core seals to new heater core.

2. Install heater core and seals into A/C evaporator housing.

3. Position heater core cover on A/C evaporator housing. Install four retaining screws.

4. Install heater dash panel seal on heater core tubes.

5. Install vacuum source line through heater dash panel seal.

6. Install A/C evaporator housing into vehicle as outlined.

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Posted on May 24, 2009

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Yes dear there is connection between heat core and AC.well yes AC might have been punctured accidently as it needs only a small leak to damage the AC.The gas just continues to leak out of it.Always take care that ur AC is never get any kind of leakage and and please dont clean ur AC with acid as it causes corrosion and gas leaks slowly slowly.
And one more thing try to get it done by a perfect mechanic.


Posted on May 15, 2009

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