NO HEATER OPERATION?

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,689 POSTS
Check this for me. With the engine hot and the heater on, feel both heater core hoses. Both should be hot. If one is hot and the other isn't, chances are the heater core is plugged. If both are hot, chances are the blend air door is stuck only allowing cold air to enter the vehicle.

Let me know what you find. NOTE: Since it started all at once, if sounds like the door.
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Sunday, September 27th, 2020 AT 11:44 AM (Merged)
Tiny
JERRI EDWARDS
  • MEMBER
  • 4 POSTS
Both hoses are hot, where is the blender door located
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Sunday, September 27th, 2020 AT 11:44 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,689 POSTS
It is part of the HVAC system and is located near the heater core in the heater core box.
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Sunday, September 27th, 2020 AT 11:44 AM (Merged)
Tiny
JERRI EDWARDS
  • MEMBER
  • 4 POSTS
It was the actuator, we have replaced it and now have heat, thank you all so very, very much for the help, it is much appreciated!
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Sunday, September 27th, 2020 AT 11:44 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,689 POSTS
Glad to help. Let us know if you have questions in the future.

By the way, was it the blend door actuator?
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Sunday, September 27th, 2020 AT 11:44 AM (Merged)
Tiny
JERRI EDWARDS
  • MEMBER
  • 4 POSTS
It sure was, we took out the glove box lining and took out the actuator box(great video of how-to on you tube)and the pin would not turn so we knew from the video that this was the culprit, the piece was only around $42, so it was much better than it being the blender door itself, once again thanks for all the help
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Sunday, September 27th, 2020 AT 11:44 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,689 POSTS
I had a feeling that is what it was. I'm glad you got it fixed. Take care and let us know if you have questions in the future.

Joe
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Sunday, September 27th, 2020 AT 11:44 AM (Merged)
Tiny
EPEREZ08
  • MEMBER
  • 1 POST
  • 1998 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
The heat went out and im trying to find the heater box in this 1998 ford explorer eddie bauer. It only blows out cold air.
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Sunday, September 27th, 2020 AT 11:45 AM (Merged)
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
Check you are getting heat to both hoses on heater core. If you are then you will need to check the blend door ! A big job i'm afraid

ELECTRONIC BLEND DOOR ACTUATOR
Removal & Installation
Disconnect battery ground cable. Remove instrument panel. See INSTRUMENT PANEL.
Remove A/C electronic blend door actuator retaining screws and electrical connector from bracket on evaporator housing. To install, reverse removal procedure.

INSTRUMENT PANEL
Removal
Disable air bag system. See AIR BAG RESTRAINT SYSTEM article. Remove steering column. See STEERING COLUMNS article in the STEERING section. Disconnect brake pedal position switch connector. Remove left and right cowl side trim panels.
Disconnect electrical connectors and ground wires on right cowl panel. Disconnect power distribution box from its bracket and position it out of way.
Disconnect 3 bulkhead wiring harness connectors from inside engine compartment. Pull bulkhead electrical connector handle to disconnect main harness. Remove passenger side air bag. See AIR BAG RESTRAINT SYSTEM article.
Disconnect electronic blend door actuator connector. Disconnect A/C-heater control panel vacuum harness connector. Disconnect radio antenna cable in-line connector. Press glove box release tabs inward while raising glove box to remove it.
Remove instrument panel defrost grille. Remove 5 instrument panel cowl top bolts. Remove floor console (if equipped). See FLOOR CONSOLE.
Remove instrument panel brace bolt. Remove both windshield side garnish moldings. Remove right instrument panel cowl side bolt. Remove instrument panel fuse panel door. Remove left instrument panel cowl side bolt.
Carefully position instrument panel away from dash panel. Remove bolt and disconnect instrument panel-to-body electrical harness. With an assistant, remove instrument panel from vehicle.
Installation
To install, reverse removal procedure.
FLOOR CONSOLE
Removal & Installation (Base Models)
Remove front seat center armrest. Remove utility tray cup holder. Remove floor console. To install, reverse removal procedure.
Removal & Installation (Upper Models)
Disconnect battery ground cable. Remove front floor console tray and message center (if equipped). Disconnect floor console electrical connector.
Remove front floor console bolts. Remove center cupholder panel. Remove center floor console bolts. Slide console rearward to disengage it from mounting bracket and remove floor console. To install, reverse removal procedure.
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Sunday, September 27th, 2020 AT 11:45 AM (Merged)
Tiny
TIMGAINES
  • MEMBER
  • 1 POST
  • 1998 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
I have a 98 explorer that the heater in malfunctioning. The heater works but there is no tempature control, it stays on high heat no matter where I dial the temp control. I checked to variable resister in the temp control and its good. Also the air conditioner fights the heater when I run it. The heater wins. I called the dealer and they sail the haeter door was stuck and they would have to take the entire dash out to fix it, for way more than I want to spend. Any suggestions?
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Sunday, September 27th, 2020 AT 11:45 AM (Merged)
Tiny
FLEXY5
  • MECHANIC
  • 512 POSTS
That's pretty much it. The dash HAS to come out. The blend door motor sits on top of the air distribution box. If the blend door itself is broken, A/C has to be evacuated and the entire box removed. Not much options there, unfortunately.
Dave
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Sunday, September 27th, 2020 AT 11:45 AM (Merged)
Tiny
UUD175
  • MEMBER
  • 1 POST
  • 1998 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 359,000 MILES
I have lost my heat and somone told me the little door that is suppose to open under the dash is either broken or stuck. How do I replace this unit are ther instructions.

ED
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Sunday, September 27th, 2020 AT 11:46 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,689 POSTS
Ed:
They are refering to the blend door, and it is a pain to access. Before taking apart the dash, make sure that is the problem. With the engine on, hot, and the heater on, feel both heater core hoses. Both should be hot.

Let me know what you find.
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-1
Sunday, September 27th, 2020 AT 11:46 AM (Merged)
Tiny
RBALDY2003
  • MEMBER
  • 1 POST
  • 1998 FORD EXPLORER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 117,000 MILES
After the car has warmed up, no heat is available in cab.
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Sunday, September 27th, 2020 AT 11:46 AM (Merged)
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
With engine running and at normal operating temperature. Turn blowers on full. Go under hood and check both hoses to heater core are hot. If not you have a blockage and the core needs flushing on this model it could also be the blend door is faulty
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Sunday, September 27th, 2020 AT 11:46 AM (Merged)
Tiny
JAMES.K.OSBORNE
  • MEMBER
  • 2 POSTS
  • 1998 FORD EXPLORER
Heater problem
1998 Ford Explorer 6 cyl Four Wheel Drive Automatic 180k miles

I need some advice on how to fix my heater in my car. It doesn't blow out any air, hot or cold. The vehicle does not overheat. I don't know exactly where the fuse for this is located. I found all the fuses. I know how to check if there broken. Just don't know what fuse is for the heat.
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Sunday, September 27th, 2020 AT 11:46 AM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Check fuse # 2 (7.5 - amp) in the fuse junction panel located on driver's side end of instrument panel. Also check fuse # 2 (40 - amp maxi-fuse) in the battery junction box located on driver's side of engine compartment, near brake master cylinder. If fuses are OK check blower motor relay located in the power distribution box (left side of engine compartment, at fender apron)
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Sunday, September 27th, 2020 AT 11:46 AM (Merged)
Tiny
HELLSHEAD
  • MEMBER
  • 3 POSTS
  • 1998 FORD EXPLORER
  • 195,000 MILES
I have checked out my heater hoses and the blower motor and they checked out fine. But now I have a leak in my radiator small leak coming from the radiator cap. I was thinking it could be the heater core or the radiator cap not giving the right pressure to hold down the coolant and causing the motor to not level right to blow out the hot air that I need.
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Sunday, September 27th, 2020 AT 11:46 AM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So both heater hoses are getting really hot?Also the coolant level isnt low?You could have a bad cap causing the coolant leak from the cap?Or the engine could be overheating?
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Sunday, September 27th, 2020 AT 11:46 AM (Merged)
Tiny
HELLSHEAD
  • MEMBER
  • 3 POSTS
The hoses are getting decent heat. The coolant level is all the way its just a small leak coming from the cap itself couple drops here and there.
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Sunday, September 27th, 2020 AT 11:46 AM (Merged)

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