6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

A/C Compressor

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Old

Mar 18, 2012 | 12:32 PM

#1

Roasted7

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Joined: Oct 2010

Posts: 552

Likes: 1

A/C Compressor

Is it true that the a/c compressor runs when the selector is in the defrost position?

Mine seems to be running all the time no matter what I set the selector on except for the "off" position.

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Old

Mar 18, 2012 | 06:15 PM

#2

Rusty Axlerod

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Joined: Feb 2011

Posts: 8,241

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From: L.A. (Lower Alabama)

Club FTE Gold Member

I don't know if mine is on ALL the time, but i'm sure it runs in defrost setting.

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Old

Mar 18, 2012 | 06:23 PM

#3

69cj

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Joined: Jul 2005

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From: Middle Tn.

It definitely runs in defrost. That's what gets the moisture off the glass.

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Old

Mar 18, 2012 | 06:52 PM

#4

dchamberlain

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Joined: Sep 2007

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From: Scio, OR

Club FTE Silver Member

It cycles in every setting except floor only, vent only and off.

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Old

Mar 18, 2012 | 11:48 PM

#5

Roasted7

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But mine cycles in every setting. What would cause this?

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Old

Mar 19, 2012 | 12:19 AM

#6

dchamberlain

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Joined: Sep 2007

Posts: 8,180

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From: Scio, OR

Club FTE Silver Member

A bad control switch or a wiring short. Something is telling the PCM to cycle the A/C.

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2007, 60l, ac, changing, compressor, ford, running, time

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