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Need diagram of heating system in a 1998 ford explorer

I have a 1998 Ford Eddie Baur edition 4 dr. with 5.0 engine, no heat in cab. Found a vacumm line that opens the canister that allows heated water into heater core, but there is no vacum in that line. It appears to go into the firewall below tghe glove box, to another vacum canister. No vacum ther either. Should I pull glove box or other dash pat5rs to see whre these li9nes go, oor is there another solution?

Posted by Anonymous on


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Posted on Jan 02, 2017

  • 10 Answers

SOURCE: no heat in a 2001 ford expedtion system blows but

their is a blend door inside your air box were the heater core and the evaporator is for your heat and your ac the blend door is not moving either your vacuum control for the blend door is not opening or it could be the type with a electric motor and it is not working

Posted on Feb 17, 2010

  • 11 Answers

SOURCE: 1999 ford taurus

it could be but if i where you i would check all the fuses

Posted on Jul 28, 2008

  • 39 Answers

SOURCE: diagram bypass heater cord on 2001 ford expedition eddie bauer

the heater bypass is quite simple, if you look at the firewall you will see two medium sized coolant lines, remove them from the firewall and link them together using a proper sized tube, you can purchase a kit at a parts store quite cheaply

Posted on Oct 11, 2008

  • 1 Answer

SOURCE: No Heat..Heater Core Is Heating..Vacuum Lines?

I have a '96 Eddie Bauer Limited and it has the same problem. They told me that there is a small butterfly valvu located in the vac lines to select between hot or cold air. There is a tension spring connected to the valve, to an acutator, and to your ac contorl system. The spring on mine broke, so the valve opens and closes due to suction only. It is supposed to be about a $700.00 fix (due to the valves location by the firewall) but I have found a way around that. Try to aggressively apply the brakes making the vehicle slow rapidly, and at the same time turning on the blower fans with full bast heat selected. If this does not work, try doing the previous while going around a right hand corner. The corner will help the momentum of the valve turn in the right direction. Remember you have to switch the fan on full blast when you try either. If it works you should hear a thud as the valve flips shut and the heat should start coming out of the vents.

Good luck

Posted on Dec 22, 2008

  • 172 Answers


If you are sure all the things you fixed are working good then I would say its the heater control valve around $30 and looks like this hope this helps


Posted on Nov 20, 2009

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