Replacement Clutch Fan
Thread Starter
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Logistics Pro
Joined: Mar 2010
Posts: 3,532
Likes: 495
From: NC
Wiring is correct and functional, I know fan is working at when engine temp hits 207, towed with it last weekend and engine cooled properly. At idle FSS is 500-550, does not increase when A/C is on at idle.
Fleet Mechanic
Joined: Jul 2018
Posts: 1,629
Likes: 103
From: Jacksonville Florida
You can do the blue wire mod. That puts ground to your fan through a toggle switch. You can activate your fan at will at idle. Increases the air flow under the hood.
I had the diagram and specs on ac clutch but can't seem to find it. Many files spread through cell and laptop. I'm unorganized comparatively. Will keep looking. I think Jack is the one that posted it, when I copied.
I had the diagram and specs on ac clutch but can't seem to find it. Many files spread through cell and laptop. I'm unorganized comparatively. Will keep looking. I think Jack is the one that posted it, when I copied.
Fleet Mechanic
Joined: Sep 2006
Posts: 1,491
Likes: 295
From: Fresno, CA
Might want to check that before taking the fan back apart.
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Logistics Pro
Joined: Mar 2010
Posts: 3,532
Likes: 495
From: NC
At idle FSS gets down to 380. Hold accelerator at 2000 and it jumped to 1300. FSS reported back to 430, engine not completely warm.
Where is the high pressure switch located? I see the low pressure switch (?) on the accumulator/drier.
Where is the high pressure switch located? I see the low pressure switch (?) on the accumulator/drier.
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Logistics Pro
Joined: Mar 2010
Posts: 3,532
Likes: 495
From: NC
There is one by the compressor 8C3Z-19D594-A and the one on the accumulator is F6RZ-19E561-AA (Discontinued).
The one by the compressor appears to be the one that controls the fan speed.
The one by the compressor appears to be the one that controls the fan speed.
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Logistics Pro
Joined: Mar 2010
Posts: 3,532
Likes: 495
From: NC
From my past A/C experience I knew there had to be a high side sensor, just couldn't find it.
I am trying to locate one closeby.
I am trying to locate one closeby.
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Logistics Pro
Joined: Jul 2014
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From: Houston, Texas
Well pardon me. Is the pressure switch different between the Fseries and Eseries? I ask because my wiring diagram shows the Dual Function switch mounted on the accumulator on my bus. But, I've also read of a "cycling switch" somewhere in the system and asked if anyone knew it's location in my AC thread. I've also read of a sensor or switch on the back of the compressor and assumed in was in the coolant line and separate from the field coil and its wiring (I'm tracking a loss of voltage for now). Anyone know if I have two electronic pressure switches or just the one mounted on the accumulater? Or am I just confusing terminology between electrical switches and hydraulic switches?
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Logistics Pro
Joined: Mar 2010
Posts: 3,532
Likes: 495
From: NC
We all are learners on this stuff.
The high pressure sensor (I ordered) has 4 pins and is in the high pressure line behind the compressor. Accumulators are on the low pressure side.
The high pressure sensor (I ordered) has 4 pins and is in the high pressure line behind the compressor. Accumulators are on the low pressure side.
Hotshot
Joined: Dec 2014
Posts: 17,829
Likes: 3,114
From: Jersey Shore
Vans, who the hell knows.
The A/C cycling switch is mounted on the accumulator/drier and is a single circuit.
The dual-function high-pressure switch is mounted on the manifold at the compressor. The two functions are to kick off the A/C compressor if the pressure is too high, and to control the fan as well.
Replacement of either does not require removing the freon.
The vans do not have the high-pressure switch mounted in the same location, it's on the high-pressure line. It also should not need to be evac'd.
The A/C cycling switch is mounted on the accumulator/drier and is a single circuit.
The dual-function high-pressure switch is mounted on the manifold at the compressor. The two functions are to kick off the A/C compressor if the pressure is too high, and to control the fan as well.
Replacement of either does not require removing the freon.
The vans do not have the high-pressure switch mounted in the same location, it's on the high-pressure line. It also should not need to be evac'd.
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
No you should not need to. It has a ball sealing check valve when you unscrew the switch it should seal. Atleast the last one I did was like that.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Key word is "Should".
Want to have a fun way to put yourself to sleep? Here is a batch of PDFs to help you do just that.
FTE dropped one of the files I was uploading and I am not sure what one is was. If you see anything
you need ask and I can see what I have.
Happy dreaming.
