Still can't figure out A/C, Please Help
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Joined: May 2004
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Still can't figure out A/C, Please Help
I recently bought a higher mileage ford f 350 psd. the air conditioning has never worked right since I bought it. It seems to work good at lower rpms; however when I pass about 55 mph it seems to quit working. I have already changed the A/c clutch cycle switch and that did not change the problem. Any ideas? Thanks in advance.
Taylor
Taylor
Postmaster
Joined: Jan 2004
Posts: 4,758
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From: colorado
i had the same problem on mine and when i had the a/c on max it would cool fine at idle and the clutch would stay engaged. i had my wife sit in the truck and run the rpms up to about 2000 and the clutch would cycle on and off. i got some r134 and added it to the system with the rpms at 2000 untill the clutch stayed engaged all the time. it has ben fine ever since
Senior User
Joined: Jan 2004
Posts: 141
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From: Rockford, IL
There is only two parts to the workings of an AC system.
The electrical side and the mechanical side (pressure)
If the compressor is kicking on and you know the switch is good... then it is low on R134. Top it off, check for a leak and take it for a ride. Whatever you do, don't use any kind of system sealer.
The electrical side and the mechanical side (pressure)
If the compressor is kicking on and you know the switch is good... then it is low on R134. Top it off, check for a leak and take it for a ride. Whatever you do, don't use any kind of system sealer.
Senior User
Joined: Nov 2002
Posts: 460
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From: Long Island
Take it for what it's worth but Ford has been known over the past few years to skip on a pound of freon to save a couple of bucks. Most new cars made by them are low about a pound thus causing lackluster A/C performence. Add a pound of 134a and you should be fine.
More Turbo
Joined: Sep 2002
Posts: 535
Likes: 10
From: Evans, West Virginia
If you are in doubt about about refrigerant level in your a/c remove it all and add exactly what the sticker says is in there if it don't work from there don't ad more it will only cost you a compressor duh $$$$$ to much gas will screw up your a/c i don't think Ford shorts on a few pennys of gas (is easy to over charge your a/c with 134a gas)
