Air conditioner
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Senior User
Joined: Jul 2014
Posts: 112
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From: Denham Springs, La.
Air conditioner
Hey guys, it's been a while. I'm having a weird ac problem. My ac works fine at low speeds,45 and under. When I get up to highway speed it will go warm. I put some coolant in and the gauge reads good. Y'all think the clutch is going out? High pressure switch? This is the first time in ten years it has acted up. Input appreciated.
Laughing Gas
Joined: Apr 2006
Posts: 1,121
Likes: 267
From: Middle Georgia
I'm not too familiar with the vacuum system on diesel engines, but vacuum is what operates the AC system. If it were mine, first thing I'd do is check out the AC's Vacuum system and see what it's doing at & above 45 mph. If it's dropping vacuum that may be allowing the blend doors to change position and give you warm air.
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Senior User
Joined: Jul 2014
Posts: 112
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From: Denham Springs, La.
I don't believe it's a vacuum issue. I have a cut off valve to the heater core.
I'm leaning more to the clutch.
Do I just pull the clutch and remove a shim? Never done that before.
I'm leaning more to the clutch.
Do I just pull the clutch and remove a shim? Never done that before.
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,129
Likes: 4,728
From: Henderson, NV
I'm not too familiar with the vacuum system on diesel engines, but vacuum is what operates the AC system. If it were mine, first thing I'd do is check out the AC's Vacuum system and see what it's doing at & above 45 mph. If it's dropping vacuum that may be allowing the blend doors to change position and give you warm air.
Hotshot
Joined: Mar 2014
Posts: 10,750
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From: Douglassville, PA
I don't think you just remove it, I think there are different sizes and you need the right one.
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Hotshot
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Laughing Gas
Joined: Apr 2006
Posts: 1,121
Likes: 267
From: Middle Georgia
I don't mind being wrong on occasion, and this time I'm happy about it. I know that around this time frame the Rangers used vacuum to control all of the AC. Never actually had any issues with that part of my Ranger, but I always wandered when I would.
Guess it isn't. Didn't want to assume that you did have the cutoff valve and that's what I was thinking if it had been vacuum operated. I just learned about the heater valve mod myself. As soon as I need to drain the coolant, it's getting done to mine.
Guess it isn't. Didn't want to assume that you did have the cutoff valve and that's what I was thinking if it had been vacuum operated. I just learned about the heater valve mod myself. As soon as I need to drain the coolant, it's getting done to mine.
FTE Chapter Leader
Joined: Jan 2005
Posts: 13,129
Likes: 4,728
From: Henderson, NV
To be honest I don't know why Ford decided to have vacuum actuated anything on a diesel truck. It's not like a gasoline vehicle where there is a ready source of vacuum so they had to install a vacuum pump. The knuckle seals for the ESOF hubs are notorious for leaking. The AC vent controls then default to defrost. If they were going for parts commonality in the climate control system they could have just made it electric actuation across all versions of the vehicle. The blend door already is. It's a head-scratcher. Sorry, rant over.
Laughing Gas
Joined: Oct 2018
Posts: 1,010
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From: San Diego
I use my AC almost daily.
Yesterday I noticed was not working.
Tested electrical connection, and then realized.....
My AC clutch plate fell off.
I found it under my hood on the frame rail today.
Does anybody know the part number of the bolt that holds it on??
And does anybody know the torque setting?
I was in it a year or more ago, and I thought I used loc-tite and a torque wrench!
Yesterday I noticed was not working.
Tested electrical connection, and then realized.....
My AC clutch plate fell off.
I found it under my hood on the frame rail today.
Does anybody know the part number of the bolt that holds it on??
And does anybody know the torque setting?
I was in it a year or more ago, and I thought I used loc-tite and a torque wrench!