A/C Q's
Thread Starter
|
Postmaster
Joined: Nov 2006
Posts: 4,196
Likes: 0
A/C Q's
Anyone know what could cause the A/C to not cool as well under moderate to heavy throttle. 
My A/C has just started doing this, under acceleration it will blow out warmer air and when sitting still or cruising it will blow cold air. Could it be low on freon?
My A/C has just started doing this, under acceleration it will blow out warmer air and when sitting still or cruising it will blow cold air. Could it be low on freon?
Gone Fishin for Mark
Joined: Nov 2004
Posts: 1,354
Likes: 2
From: West of Houston
Im not sure of the problem. It seems that for some reason the PCM is telling it to disengage. You might do a search for A/C clutch 'air gap'.
If it gets too hot, just go fishin......
Bump!
If it gets too hot, just go fishin......
Bump!
Senior User
Joined: Sep 2007
Posts: 197
Likes: 0
Yeah you might want to check the gap in the Air clutch...Sounds like it may be getting worn long.
Its an easy fix....The gap needs to be around .035. Pull the 1 bolt in front of the compressor and get a washer off the shaft to bring it back in range when re-installed.
Its an easy fix....The gap needs to be around .035. Pull the 1 bolt in front of the compressor and get a washer off the shaft to bring it back in range when re-installed.
Thread Starter
|
Postmaster
Joined: Nov 2006
Posts: 4,196
Likes: 0
Thanks for the tip guys, i did a search and found that article that Springerpop wrote. I'm going to give it a whirl today!
Trending Topics
Lead Driver
Joined: Dec 2003
Posts: 5,250
Likes: 42
yeah, check the gap first. if that doesn't cure it, get a good set of gauges and check the freon level.
mine did that, and i ended up putting in a complete new system. f**ds are notorious for that.
mine did that, and i ended up putting in a complete new system. f**ds are notorious for that.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Mountain Pass
Joined: Sep 2002
Posts: 148
Likes: 6
I'd check the freon charge first with a set of gauges. I have an '02 and I have never been able to run in Max A/C on the highway. I've worked on a/c and refrigeration for years and did a lot of tests. When the rpm on my truck is above 1500 and the cab temp is at about 78 degrees, the low pressure side goes to 23psi which is at the cutout point for the low pressure cutout switch.
That low press cutout switch is there to protect the system from freezing. When you get your gauges you'll see that 23 psi is about 30 degrees F iirc. I just didn't feel like messin' with it so left it like that for years. I now see some clues after running for years that the accumulator may be the culprit. I'm going to change it out soon and see if I can finally run on Max a/c without the compressor cutting out when on the highway or above 1500 rpm. It really does suck to not be able to use Max a/c, well, I could use it but what's the use, it doesn't cool the truck down any better then Normal setting because in Normal setting, the compressor will keep running because the fan is sucking in outside warmer air and this keeps the low pressure side higher.
Anyhow, your symptoms are the same as mine, let us know what you find out.
That low press cutout switch is there to protect the system from freezing. When you get your gauges you'll see that 23 psi is about 30 degrees F iirc. I just didn't feel like messin' with it so left it like that for years. I now see some clues after running for years that the accumulator may be the culprit. I'm going to change it out soon and see if I can finally run on Max a/c without the compressor cutting out when on the highway or above 1500 rpm. It really does suck to not be able to use Max a/c, well, I could use it but what's the use, it doesn't cool the truck down any better then Normal setting because in Normal setting, the compressor will keep running because the fan is sucking in outside warmer air and this keeps the low pressure side higher.
Anyhow, your symptoms are the same as mine, let us know what you find out.
Thread
Thread Starter
Forum
Replies
Last Post
918eva
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
7
May 24, 2010 09:16 AM