Good afternoon...some time back a friend of mine replaced a bad heater coil. the job required removing the dash. when reassembled, no air would blow thru the vents. we could hear air blowing but none came in the cab, hot or cold. closer inspection told me that the dash had not been put back the way it was. could it be that some hose or vent is not properly aligned that would route the air into the cab? i am going to attempt the reinstallation of the dash.anything i should be looking for?
Look for an opening that might be covered by insulation or a duct hose that didnt get hooked back up. can you feel air comming out of places that it shouldnt be? if so that is definately the case. also make sure that the cable to the operator door is hooked up and operating properly.
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Heater core is a lot of work, but not extremely technical. You do have to remove the console, if applicable, and most of the passenger side dash materials, until you can get to all the small bolts on the bottom of the black blower unit. Beware of all the blend doors, they have to go back in the right places!. Then, to get the old core out, you may want to cut the metal tubes of the heater core, so you can work loose the hose connections to fit the new one. Strongly recommend Ford OEM replacement core, about $110, for fit. Also check closely the bottom of the blend door axle for cracks, you may want to replace it (about $35) while you are there. Local A/C shop with good reputation quotes $350 labor for this job. Good luck!
very large job by the look of it, can download workshop manual from pdftown.com
degas air cond, drop coolant, remove dash, reomve front seats, remove console, remove heater and evaporator case assembly then get to replace heater core.
as i said big job.
to change this heater core is a big job, I did mine on my 99 F150, which is incredibly similar, it requires the removal of the complete dash to remove the environmental control station (heater core/air conditioning evaporator). If you are not comfortable with removing basically the whole dash, I recommend that you take it to a good shop in your area. If you are comfortable with it, then you should get a Haynes or Chilton Manual and follow the steps listed in those manuals.
To bypass you would have to disconnect the two heater hoses on the right side of the engine compartment at the engine connectors and install a hose between the two.
It has been a long time since I've replaced one of those. From what I remember you don't have to go through pulling the heater box out. You do need to remove the glove box assembly. Look up under the passenger side of the dash. If you see the bulge of the motor/cover hanging straight down then remove the cover and the motor will be there. If you don't see that then te motor is mounted horizonally. If that is the case then the fresh air door assembly will need to be removed and it is behind that.
Here is a quick check to see if the motor is bad. Thump the bottom of the heater box by the passenger's feet. if the motor comes alive or makes noise then it is bad. Also check the fuse and make sure that it doesn't work on any speed. (the resistor would prevent operation on only one speed or more but generally not all speeds)
This is a big job which involves discharging and removing parts of the A/C system as well as removing parts of the dash. I had the core done on a 94 Sable years ago and it was a very labor intensive and expensive job. Here are some instructions I found for a 94 Taurus which should be the same thing or similiar, but I don't guarantee that. Please note that these instructions were not tested by me and may contain errors or be incomplete in some way. For example "remove instrument panel" sounds simple but in reality is a process in itself requiring the removal of many screws. Naturally you would have to recharge the A/C and refill the coolant when done.
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. 6. Lift heater core and seals from A/C evaporator housing. ________________________________________________ Installation
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.
7. Reinstall dashboard components.