AC problems
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Tuned
Joined: Jul 2013
Posts: 268
Likes: 2
AC problems
Good Morning,
I have an 04 Ex, Limited, dual air, 158k. Recently the air has started blowing a little warm while sitting still but under way it is nice and cold. I have checked my AC low pressure with a cheap can gauge, all I had available at the time, it registered 65 psi at idle, outside temp was around 97.
I have thought about tearing the system down, replacing oriface tube, replacing o-rings, cleaning out the entire system, replacing coolant and seeing if that was any better. I have also considered installing a couple of electric fans in front of the condinser with a relay which would turn them on anytime the compressor is running. I saw this setup on an Ex in Florida, owner said it worked really well for him.
Anybody else have any suggestions or recommendations.
Thank you,
Jeff
I have an 04 Ex, Limited, dual air, 158k. Recently the air has started blowing a little warm while sitting still but under way it is nice and cold. I have checked my AC low pressure with a cheap can gauge, all I had available at the time, it registered 65 psi at idle, outside temp was around 97.
I have thought about tearing the system down, replacing oriface tube, replacing o-rings, cleaning out the entire system, replacing coolant and seeing if that was any better. I have also considered installing a couple of electric fans in front of the condinser with a relay which would turn them on anytime the compressor is running. I saw this setup on an Ex in Florida, owner said it worked really well for him.
Anybody else have any suggestions or recommendations.
Thank you,
Jeff
FTE Chapter Leader
Joined: Nov 2010
Posts: 30,595
Likes: 1,236
From: N. IL
https://www.ford-trucks.com/forums/1...l#post15048442
Would be worth checking the clutch fan.
Also worth reading: http://springerpop.com/F350/air_gap.html
Would be worth checking the clutch fan.
Also worth reading: http://springerpop.com/F350/air_gap.html
Thread Starter
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Tuned
Joined: Jul 2013
Posts: 268
Likes: 2
Fan seems to be working fine. At idle it sometimes goes up to 850rpm with water/oil around 195/205 respectively. Sometimes I see it as high as 1200 at idle but AC is still warm at idle. Fan speed comes from a ScanGuage II.
Hotshot
Joined: Jan 2004
Posts: 19,765
Likes: 1,082
From: St Louis
You really need a full manifold gauge set to accurately diagnose A/C performance issues. Otherwise, it's like trying to perform a visual operation that requires depth perception with only one eye. It doesn't work.
Or, you can simply guess.....
Or, you can simply guess.....
Mountain Pass
Joined: Apr 2014
Posts: 160
Likes: 0
From: Tempe
Agreed. My Ex puts out 50psi on the low side and 250psi on the high side with a mostly worn out compressor that makes pretty good noise, if that is any help. You can get the gauges anywhere that sells car parts usually and its easy to take a reading. My A/C is marginal in the Arizona heat when idling and mostly OK going down the road.
Cargo Master
Joined: Aug 2012
Posts: 2,872
Likes: 952
From: Kaufman TX
65 is too high for that temperature. However you also need to know what the high side pressure is. If they're both too high you're overcharged or under-cooled at the condenser.
Otherwise with the suction side not dropping like it should I'd expect a slipping clutch or worn out compressor.
Really just SWAGs here though without having the full picture.
Otherwise with the suction side not dropping like it should I'd expect a slipping clutch or worn out compressor.
Really just SWAGs here though without having the full picture.
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