a/c problems
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a/c problems
I have a 99 f250 sd 6speed manual. My a/c works great at times,but after a long timedriving and then stopping at a red light the ac stops blowing cold.Then when the rpms get up it starts getting cold again when the air gets hot i can idle the engine up to about 2500-3000 and cold air comes at me.And sometimes the ac wont get cold at start up until i get moving.The truck has a new fan clutch.
Lead Driver
Joined: May 2007
Posts: 5,613
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From: Flagstaff, Arizona
I recently had an intermitten problem with my A/C also.....turned out it was the wires in the plug were loose, the one on the top in front of the compressor. I took it all apart and made sure the connections were better and no problems since then. There is another plug down a bit lower you could check also.
Post Fiend
Joined: Feb 2007
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From: Blairsville,Ga
I have a 99 f250 sd 6speed manual. My a/c works great at times,but after a long timedriving and then stopping at a red light the ac stops blowing cold.Then when the rpms get up it starts getting cold again when the air gets hot i can idle the engine up to about 2500-3000 and cold air comes at me.And sometimes the ac wont get cold at start up until i get moving.The truck has a new fan clutch.
https://www.ford-trucks.com/forums/7...ttent-a-c.html
Lead Driver
Joined: Jun 2003
Posts: 8,298
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From: Damon (South East Texas)
a/c clutch gap revisited
This is my thoughts concerning the a/c clutch gap. When the gap gets too large, more voltage is required by the magnet to pull the clutch shoe down. At idle, the alternator output is lower. With the fan and other accessories on, the voltage is not sufficient to do the job. When the speed is raised and voltage increases, the pull gets strong enough to overcome the distance. The ideal gap, per Ford specs, is ~.014-.030'' (measured in 3 places around the clutch). Just enough that the clutch shoe doesn't rub when disengaged.
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Lead Driver
Joined: Feb 2000
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From: Palm Bay, Florida
I have a simmiliar problem with my 1997 Thunderbird's a/c execpt I've checked the gap and its good, but a tap on the front of the clutch with a screwdriver handle and it will work for a little while....I'm wondering if my clutch setup is just plain worn out and should be replaced??
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Lead Driver
Joined: Jun 2003
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From: Damon (South East Texas)
I have a simmiliar problem with my 1997 Thunderbird's a/c execpt I've checked the gap and its good, but a tap on the front of the clutch with a screwdriver handle and it will work for a little while....I'm wondering if my clutch setup is just plain worn out and should be replaced??
Senior User
Joined: Jul 2007
Posts: 157
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What if there are no 'shims' but the tappy with the screwdriver still works?
I was asked this today by a gentleman I cross paths with each week. I asked why in the hell he was running the a/c, it's 27 degrees? He says, "defrost, duh..."
I was asked this today by a gentleman I cross paths with each week. I asked why in the hell he was running the a/c, it's 27 degrees? He says, "defrost, duh..."
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jeffrey5679
1997 - 2006 Expedition & Navigator
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May 8, 2013 09:29 AM