Question about 1997 Ford Expedition

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Heat works on the front and the back only works when I use the front controls to turn on heater.The back Heater control panel wont turn the heat on for thr back.but still blos hot air when turned on only by the front panel.is there a fuse for the back heat panel ? if yes where is it located ?

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  • Ford Master
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Here's what the system looks like. left rear panel
please rate as fixya if this solves your issue

heat works on the front and the back only works - 65a9b25.gif
Check fuse #7, 5 amp dash fuse panel
check fuse # 13, 30 amp in power dist. box under hood I think
check auxilaiary a/c relay in RPO Relay box (rear floor panel)
check fuse #23, 10 amp in dash fuse panel
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Posted on Mar 11, 2009

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Rear blower: only works on high when set on cold, won't work at all when set to heat


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Check fuses to the A/C or Heater Control Unit in the fuse box(es). IF none are blown, then may have to replace A/C-Heater Control Unit:

A/C-Heater Control Unit Removal & Installation To Remove:
  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  2. Remove or disconnect the following:
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My 2001 toyota tundra heater wont blow hot air. I checked to see if the heater core is cloged it seems fine the heater control valve is operating properly, and I changed the thermastat. and yet the heater...


If you've changed the coolant recently, it could be air locked in the heater core. To remove park the truck with the front higher than the back and remove the radiator cap. Start the engine and let it run while watching for a big air bubble burp coming out the radiator neck. Top off the coolant and continue.

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Possible blend door motor (controls amount of heat that comes out). Or heater core in back is clogged, or air bubble. If your able to locate the two heater hoses that run to the back of the vehicle and check to see if there hot next to the heater core. if both are hot (be careful not to burn yourself) then the flow is good usually. need to pull the panel off and check the blend door motor is working when you turn the rear heater control to cold to hot. let me know what you see

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No back heat in Expedition, Blows cold air but front works fine


Shelly,

Buy used parts at car-part.com. Look on page with * to find the cheapest part. Coud be your temp blend door (#2) may not be moving back and forth. Or, you are not getting hot water to the rear heater core.

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You may have to crawl under the truck and feel the heater hoses to see if they are hot. You will find a group of 4 lines, 2 for heater and 2 for a/c. If hot, you know hot water is getting back to the heater core. If not, there may be a hot water vave that's not working. Not sure if EXP. has a water valve for rear.

Let us know what you you find. Good luck.

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You have been told right. The resistor block is under $20.00 from the dealer.

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No heat in front..only in back


PROBABLY THE BLEVIN DOOR MODULE LOCATED BEHIND THE HEATER CONTROL AND RADIO. FIRST REMOVE THE RADIO WITH DIN TOOLS AND THEN THE COVER FOR THE HEATER CONTROL MODULE WITH 7, OR 8 MM IT'S A WHITE PLASTIC BOX IF THE MODULE GOES BAD YOU MAY HEAR A CLICKING TRY TURNING THE LITTLE SHAFT IN THE BOTTOM RIGHT CORNER OF THE MODULE COUNTER CLOCK WISE SEE IF IT HELPS.

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