Explorer Help

BurningRubber

10 Year Member

Dec 6, 2004

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Jun 20, 2008

#1

• Jun 20, 2008

• #1

Have a question.

1997 Explorer, 4.0.

When the A/C is set on "Max A/C" it works fine, blows cold. When switched to normal A/C or ANY air setting it blasts SUPER hot air, as if someone set the thermostat to all heat.

Turn the "Max A/C" back on and it works just fine.

Moving the tempature knob does nothing to change this once the heat is pouring out...

Any suggestions?

 

timeless2

Vi Veri Veni Versum Vicus Vici

Admin Dude

Nov 29, 1999

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Jun 20, 2008

#2

• Jun 20, 2008

• #2

Is the compressor running when the "normal" a/c setting is active? Pop the hood and have someone help you out by toggling the setting between the two (max & norm) for a few minutes each to determine this.

 

BurningRubber

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Jun 22, 2008

#3

• Jun 22, 2008

• #3

I believe that it is, not 100% sure.

Its been raning the last few days so thats why I havnt checked yet.

Thanks for the quick reply though, sorry mine was delayed.

 

timeless2

Vi Veri Veni Versum Vicus Vici

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Jun 23, 2008

#4

• Jun 23, 2008

• #4

Depending on how you answer from here leads us to a few possibilities. I'm no ASE Tech by any means, but here are some preliminary stabs.

Could be the relay leading from the control unit in the dash.
Could be the relay telling the compressor to cycle off/on.
Could be the WOT sensor (compressor) gone awry.

 

BurningRubber

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Jun 23, 2008

#5

• Jun 23, 2008

• #5

Thanks man, it is just annoying to have it set on max the whole time, and cooking yourself if it isnt.

Ill post back up when I take a further look.

 

timeless2

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Jun 30, 2008

#6

• Jun 30, 2008

• #6

Get it figured out?

 

Darkwriter77

Resident Ranting Negative Nancy

5 Year Member

Jul 1, 2005

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Jun 30, 2008

#7

• Jun 30, 2008

• #7

Another idea: If the Explorer uses the same kind of electric blend door actuator motor as used on Crown Vics and Town Cars and such that have that "Automatic Climate Control" crap, those things have been known to do some wacky things by switching over to full-heat when you want full-cold and vise-versa. Otherwise, if it's vacuum-actuated, perhaps you have a disconnected/damaged vacuum hose underneath the dash there somewhere that's in control of your temperature blend door actuator...?

 

Hardtop68

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Aug 23, 1999

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Jul 1, 2008

#8

• Jul 1, 2008

• #8

Doing the analogy with a 2000 GT... hot engine coolant is flowing all the time through the heater core... if you get cold air in MAX A/C (I always use MAX A/C) and HOT air on NORM A/C, then the blend door is opening when it is not supposed to do it... on Mustangs there is a vacuum motor for this door... if this were a Mustang, there should be a vacuum line connected to the wrong port on the MAX/NORM A/C knob...

Has anyone worked around the dash lately?

 

BurningRubber

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Jul 2, 2008

#9

• Jul 2, 2008

• #9

Thanks for giving me some more suggestions.

This has been on the back burner since shortly after I posted this, but I am going to mark this thread so I can reference back to it.

We lost a family member and have been trying to deal with that and me nor my dad have had much time to be around the Explorer that needs the help.

 

timeless2

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Jul 3, 2008

#10

• Jul 3, 2008

• #10

BurningRubber said:

We lost a family member and have been trying to deal with that and me nor my dad have had much time to be around the Explorer that needs the help.

Click to expand...

Ouch. Take care, man.