Lost of heating after 40 minutes of driving.

Did you by chance check for DTC'S diagnostic trouble codes?

Instrument Cluster Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1255 Air Temperature External Sensor Circuit Open Instrument cluster Go To Pinpoint Test E . B1257 Air Temperature External Sensor Circuit Short to Ground Instrument cluster Go To Pinpoint Test E . B2097 Compass Module Failure Instrument cluster Go To Pinpoint Test B . U2013 Compass Module - No Response Instrument cluster Go To Pinpoint Test B . All Other DTCs - Instrument cluster REFER to Section 419-10 .

Question edited for clarity, full year make model
Question moved to sub category.

It appears to have history. A bit worrying you say 'kinda changed the filter and fluid'. Most are sealed for life, and the amount of fluid is critical. If you drain, you measure what comes out and replace with the same amount of the right type of ATF.

You are not alone with issues

https://www.google.com/search?q=1994+Explorer+Eddie+Bauer+4x4+wont+go+into+Drive

Schematics

https://www.google.com/search?q=1994+ford+explorer+eddie+bauer+4x4+transmission+schematics

....

If it is auto, you need to get the tranny serviced. It is slipping.

Hope this helps.

Interior Fuse Box Location 2006 2010 Ford Explorer 2006 Ford Explorer...

Diagram:

Fuse and relay locations 2nd generation power distribution box Layout

Replace your blend door and actuator for the blend door and everything will work fine after that. This is a fairly common problem with all fords. The location is behind the glove box.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_677dced97ad9bddf

Bad gas maybe, maybe junk in tank from bad gas or it could b the cadalidic converter

Try disconnecting the battery for five minutes to reset the computer. You might want to write down your radio station settings. Some radios retain memory and some don't.

The headlamp switch will cause the lamps to turn off. The switch heats up and turns the headlamps off. It will cool down and work for about 10 minutes and cut out,

have your abs sensors and, disks cleaned and, checked

It most likely is the heater control assy. say this a lot when i worked for ford.