Question about 1991 Ford Econoline

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How do i install a heater coil - 1991 Ford Econoline

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Heater core is correct dignosis. is it leaking in floorboard? it's located on passenger side under dash, the glove box will need to be removed,that will expose the heater core box. you'll need to disassemble the box that contains the heater core. then go under hood on passenger side and remove the 2 hoses that connect to it under hood. after thats done go under dash and pull heater core out, will look like a very small radiator.if you are not mechanically inclined i suggest you get estimates, this is a very painstaking progress that sounds easy but not.but if your persistent i suggest you purchase an automotuve book, say at autozone or advance auto and follow step by step instructions,fortunatlly yours isn't that hard to do. most cars need the entire dash removed. i'll be online most of day incase you have problems. hope this helps!!!

Posted on Nov 11, 2010

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If you mean the heater core is leaking. Here is how to change it:

Heater Core Removal & Installation Heater core removal gm-10-00-589.gif

To Remove:
  1. Remove the HVAC assembly.
  2. Remove the heater core cover screws.
  3. Remove the heater core cover from the HVAC assembly.
  4. Remove the heater core gasket from the core.
  5. Remove the heater core from the HVAC module assembly.
To Install:
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Oct 18, 2010 | 2000 Chevrolet Silverado 1500

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Either a leaking hose going to the heater coil or a bad heater coil. Water gets inside car on front floorboard.How do I replace heater coil?


To be honest, most mechanics hate replacing heater cores because of their location. They are usually on the firewall on the inside of the car underneath the glove box under the dashboard and behind a plastic black cover. If you look under the hood at the firewall on the passenger side, you should see on inlet hose and one outlet hose which should be replaced along with the heater core. They must be removed first before you can remove the heater core. Basically you have to lay on your back on the passenger side Front) floorboard, remove the necessary panels to get to the cover, remove the heater core and install the new one first, then intall the new hoses, reinstall the cover and any panels you removed. Lastly, be sure to bleed and top off the coolant while you run the heater, then check for leaks

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I've installed a heater core and the issue is that before the core was bypassed and Im not sure what hoses connect were. Any helpful advice would be appreciated.........


Usually it doesn't matter, if there is a control valve to control the flow of water around or on the heater coil generally the hose coming from the intake which is a supply hose goes to the valve end of the heater coil

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2003 Grand Prix not blowing hot air. Does the heater coil need to be replaced? If so where is it located?


If the heater coil was bad, it would be leaking radiator fluid... probably into your dash/floorboard (depending on where it is installed in your model car). There is a switch that diverts the hot radiator fluid through the heater coil when you want heat. There is also an air diverter valve that helps to mix the hot and cold air. The fluid valve is controlled by the A/C settings control. The one that you use to choose between heater/air conditioner/vent/ defrost. The air diverter is controlled by the temp mixing controller. The most simple explanation is that one of those valves or the controller of one of those valves is not working. If the hot water cant be diverted through the heater coil, the coil can't exchange the heat (warming the air). If the air diverter (hot/cold controller) cant move to add heat, then all you will feel is air from the vent side (from outside) or from the A/C cooling the air.

I would guess that its either a controller or one of the valves themselves. Odds are, it is a controller. That tends to be what malfunctions first.

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Locter heater coil 99 plymth grnd voyager 3. liter


it is under dash, drivers side. dash has to be pulled for installation. go to PDF PDFTown.com. should have instructions, or go to auozone.com, and register for znet. it has installation for your HEATER CORE there. good luck.

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When the heater coil was installed a wire has gotten a bare spot and is shorting out.You should check around the heater coil.

Aug 24, 2008 | 1997 Pontiac Grand Am

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