So my vehicle needed some serious work on the heater core so the whole dash was removed along with most of the audio in it. Its an older car and it has an eclipse 5443 head unit. Old Boston Acoustic speakers along with two sub amps, and a 500 watt amp. The only thing removed was the 4 front speakers, and and the head unit. Everything was working fire before hand. Now when I turn the car on I get an error message on the display screen of the deck that reads, Call 800 then a pause then C7300835. My first thought was this was some support phone number. So I called it and nothing happened. Anyways, Im kinda stumped as to what I need to do, aside from getting a new deck.
Eclipse used an anti-theft technique where a special CD is required to unlock the unit if it loses power. These were not always set up, and I got lucky where mine was not... You may be able to contact Eclipse about it as it is an older unit, but I wouldn't hold your breath.
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are you sure its the heater core?I had a 2003 mitsu gallant and it was the a/c draining on the floor.It was the drain under the hood that needed to be sealed.You see around the drain they put something that helps with vibration and it erodes causing the water to go back in the vehicle.Find a good gasket material like something they use to put around windshields and work it around the drain.This is common in mitsus .If your sure its the heater core.Give more specific infomation
Replacing the heater core on your vehicle is a job in itself and if one is not mechanically inclined or knowledgable in this area I highly do not recommend attempting taking on such a task.I have done many of these and I will tell you it involves removing the whole dash including lossening the steering wheel and laying it on the seat your dash will also be laying on the seat but if you get this far behind the dash there is a plenum assembly your heater core is inside this case depending on how yours is set up you may or may not need to disconnect th A/C lines and you may or may not need to remove the whole plenum assembly to replace the heater core. If you do plan on attempting to take on this task I recommend you buy a repaire manual for your vehicle and follow the instructions.
No, you don't have to pull the whole dash board but you have to pull a few panels....here is the steps on how to get to it and remove and replace it:
Disconnect the negative battery cable.
Drain the cooling system and disconnect the heater hoses from the heater core tubes. Plug the hoses and the heater core tubes to prevent coolant leakage.
NEVER open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
Remove the 3 nuts located below the windshield wiper motor attaching the left end of the plenum to the dash panel. Remove the 1 nut retaining the upper left corner of the evaporator case to the dash panel.
Plenum removal—1990-98 vehicles
Disconnect the vacuum supply hose(s) from the vacuum source. Push the grommet and vacuum supply hose(s) into the passenger compartment.
Remove the right and left lower instrument panel insulators.
On 1989 vehicles:
Remove the 3 glove compartment hinge screws, disconnect the check arms and remove the glove compartment.
Loosen the right door sill plate and remove the right side cowl trim panel.
Remove the bolt attaching the lower right end of the instrument panel to the side cowl.
Remove the instrument panel pad as follows:
Remove the 2 screws attaching the pad to the instrument panel at each defroster opening. Be careful not to drop the screws into the defroster openings.
Remove the one screw attaching each outboard end of the pad to the instrument panel.
On Crown Victoria, remove one pad attaching screw near the upper right corner of the glove compartment door.
Remove the 5 screws attaching the lower edge of the pad to the instrument panel. Pull the instrument panel pad rearward and remove it from the vehicle.
On 1990-98 vehicles:
Remove all instrument panel mounting screws and pull the instrument panel back as far as it will go without disconnecting any wiring harnesses.
Make sure the nuts attaching the instrument panel braces to the dash panel are removed.
Loosen the right door sill plate and remove the right side cowl trim panel.
If equipped with manual air conditioning, disengage the temperature control cable housing from the bracket on top of the plenum. Disconnect the cable from the temperature blend door crank arm.
If equipped with Automatic Temperature Control (ATC), proceed as follows:
On 1989 vehicles, disconnect the temperature control cable from the ATC sensor.
Detach the vacuum harness line connector from the ATC sensor harness and detach the electrical connector from the ATC servo connector.
On 1990-98 vehicles, remove the cross body brace and disconnect the wiring harness from the temperature blend door actuator. Detach the ATC sensor tube from the evaporator case connector.
Detach the vacuum jumper harness at the multiple vacuum connector near the floor air distribution duct.
Disconnect the white vacuum hose from the outside-recirculating door vacuum motor.
Floor air distribution duct removal—1990-98 vehicles
Remove the 2 hush panels.
Remove 1 plastic push fastener retaining the floor air distribution duct to the left end of the plenum.
Remove the left screw and loosen the right screw on the rear face of the plenum and remove the floor air distribution duct.
Remove the 2 nuts from the 2 studs along the lower flange of the plenum.
Heater core removal—1990-98 vehicles
Carefully move the plenum rearward to allow the heater core tubes and the stud at the top of the plenum to clear the holes in the dash panel. Remove the plenum from the vehicle by rotating the top of the plenum forward, down and out from under the instrument panel. Carefully pull the lower edge of the instrument panel rearward, as necessary, while rolling the plenum from behind the instrument panel.
On 1989 vehicles with ATC, remove the ATC servo from the plenum.
Remove the 4 retaining screws from the heater core cover and remove the cover from the plenum assembly.
Pull the heater core and seal assembly from the plenum assembly.
Carefully install the heater core and seal assembly into the plenum assembly. Visually check to ensure that the core seal is properly positioned. Position the heater core cover and install the 4 retaining screws.
On 1989 vehicles with ATC, install the ATC servo on the plenum.
Route the vacuum supply hose through the dash panel and seat the grommet in the opening.
Position the plenum under the instrument panel with the register duct opening up and the heater core tubes down. Rotate the plenum up behind the instrument panel and position the plenum to the dash panel. Insert the heater core tubes and mounting studs through their respective holes in the dash panel and the evaporator case.
Install the 3 nuts on the studs along the lower flange and one on the upper flange of the plenum. Install the 3 nuts below the windshield wiper motor to attach the left end of the plenum to the dash panel and the one nut to retain the upper left corner of the evaporator case to the dash panel.
Position the floor air distribution duct on the plenum. Install the 2 screws and plastic push fastener. If removed, position the panel door vacuum motor to the mounting bracket and install the 2 attaching screws.
Connect the white vacuum hose to the outside-recirculating door vacuum motor. Attach the vacuum jumper harness to the plenum harness at the multiple vacuum connector near the floor air distribution duct. Install the floor duct.
If equipped with manual air conditioning, connect the temperature control cable housing to the bracket on top of the plenum and connect the temperature control cable to the temperature blend door crank arm. Adjust the temperature cable.
If equipped with ATC, proceed as follows:
On 1989 vehicles, connect the temperature control cable to the ATC sensor and adjust the cable. Route and attach the vacuum harness connector to the ATC sensor and attach the electrical connector to the ATC servo connector. Do not block the sensor aspirator exhaust port with the excess vacuum harness. Install the ATC sensor tube between the sensor and the evaporator connector.
On 1990-98 vehicles, attach the ATC sensor tube to the evaporator case connector. Install the cross body brace and connect the wiring harness to the blend door actuator.
Install the bolt to attach the lower right end of the instrument panel to the side cowl. Install the right side cowl trim panel and tighten the right door sill plate attaching screws.
On 1989 vehicles, install the instrument panel pad and the glove compartment door. On 1990-98 vehicles, push the instrument panel back into position and install all instrument panel mounting screws. Install the right and left lower instrument panel insulators.
Connect the vacuum supply hose(s) to the vacuum source.
Install the right and left lower instrument panel insulators and install the 2 hush panels.
Unplug the heater core tubes and the heater hoses and connect the heater hoses to the heater core tubes. Fill the cooling system.
Connect the negative battery cable and check the system for proper operation.
Usually the whole hvac box has to come out of the vehicle to replace the heater core. Once the box is out it can be opened and the heater core removed. Be careful with all the vent doors and actuators, make note of how everything came apart. The last thing you want to do is have to remove the dash and box because something wasn't on just right. Good luck.
To replace the heater core in that model truck you will need to remove the whole dash, steering colum. Then discharge the A/C and remove the heater/a/c case. It is a time consuming job and difficult without the proper tools and info. If you are going to attempt this then be sure to disable the air bag system by disconnecting the battery for at least 10 min. before you start working. Good Luck
It is very hard!! You actually are supposed to remove the whole dash!! I took a shortcut and just took the screws out of the plastic box under the dash where the heater core is,behind the console, next to the floorboard, and cut it across the back on the bottom. You then have to get under the car to remove this screw that is on the firewall between the 2 heater core hoses..then remove the hoses from the heater core on the firewall. Then you can get back inside the vehicle and it will pull out. When you replace, the cover that you cut, just put the screws back in and put some tape across where you cut the cover off. It saved me from having to take the whole dash out, and having to spend $300 to have a mechanic replace my heater core!!
Have replaced my heater core in my 2001 regular cab 4wd in december 2009. Had to pull the complete dash including the complete metal dash behind the dash that you see. Also had to remove the right passenger side inner fender well to acess the remaining two bolts that hold the heater core cover to the firewall. Its an insane job to do but the repair shop books call for 9 1/2 hrs to do the job. I'm not an expert but this is what it takes.