AC problem at low rpm
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New User
Joined: Mar 2010
Posts: 2
Likes: 0
From: Tallahassee, Florida
AC problem at low rpm
I have a 2002 F250 SuperDuty Crew with 7.3 Diesel. The problem is when in traffic in town the AC will blow warm air at low rpm. When I get up to speed on the highway it blows cold air like normal. Any idea what the problem might be.
Thanks..
Thanks..
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
How handy are you with tools? The very first thing I'd recommend is the easiest, quickest, and cheapest.
Lots of these trucks are having this problem, as the time and mileage is getting to that point.
See:
SpringerPop's Compressor Clutch Air Gap
Pop
Lots of these trucks are having this problem, as the time and mileage is getting to that point.
See:
SpringerPop's Compressor Clutch Air Gap
Pop
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
I recently had the same issue. Check the air gap first as Pop mentioned. Then check the freon level.
I ended up having to replace the clutch on mine. After everything else checked out, I noticed the clutch was cycling on and off at a fast rate even at higher rpm's. The new clutch and my AC blows colder than I remember it being new.
I ended up having to replace the clutch on mine. After everything else checked out, I noticed the clutch was cycling on and off at a fast rate even at higher rpm's. The new clutch and my AC blows colder than I remember it being new.
Postmaster
Joined: Jan 2009
Posts: 2,544
Likes: 4
From: Suffolk, VA
Doing what's in Pop's write up helped some, but I had even better results by putting a valve inline on the heater hoses. Now it'll freeze me out of there and blows pretty cold at idle; a lot better than it used to. There's a write up somewhere with part numbers.
Fleet Owner
Joined: Mar 2007
Posts: 28,296
Likes: 6
From: BLT, MN
Pop, I had a quick question for you. After reading through the write up I guess I don't completely understand what the gap "should be". Should there ideally be no gap? Maybe I am a little out of it this morning or just stupid but I don't quite get what the final gap should be.
I just reread the write up. Should the gap be .020?
Edit: Hey Keith. I need to do that mod also some day. Not usually super hot in MN but for traveling that may be a no brainer mod
I just reread the write up. Should the gap be .020?
Edit: Hey Keith. I need to do that mod also some day. Not usually super hot in MN but for traveling that may be a no brainer mod
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Posting Guru
Joined: Feb 2010
Posts: 1,411
Likes: 1
From: Opelika, AL
Pop, I had a quick question for you. After reading through the write up I guess I don't completely understand what the gap "should be". Should there ideally be no gap? Maybe I am a little out of it this morning or just stupid but I don't quite get what the final gap should be.
I just reread the write up. Should the gap be .020?
Edit: Hey Keith. I need to do that mod also some day. Not usually super hot in MN but for traveling that may be a no brainer mod
I just reread the write up. Should the gap be .020?
Edit: Hey Keith. I need to do that mod also some day. Not usually super hot in MN but for traveling that may be a no brainer mod
yep .020 it help on mine as well....still blows warmer at idle
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Postmaster
Joined: Jan 2009
Posts: 2,544
Likes: 4
From: Suffolk, VA
Without getting in to the install specifics of the mod, I originally t'd the vacuum line in to the port that would keep the valve closed on all of the settings on the left side. That proved to be a mistake because you can't regulate the temp in the A/C setting. While it's ok for me because I like it cold enough to be able to hang meat inside the cab, my wife and son were freezing and we had a long ride ahead of us. When I got back I switched it so the valve only closes on the Max (recirc) setting.
Postmaster
Joined: Jan 2009
Posts: 2,544
Likes: 4
From: Suffolk, VA
Here maybe this will help you; a link to the part number and a huge thread to read:
https://www.ford-trucks.com/forums/5...ml#post7633017
https://www.ford-trucks.com/forums/5...ml#post7633017
