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Truck AC issues.
#11693411
06/28/16 03:01 PM
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Joined: Oct 2004
Posts: 38,822
KingwoodCat
OP
TFF Guru
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OP
TFF Guru
Joined: Oct 2004
Posts: 38,822 |
I've been having issues with the truck AC since October. Compressor and Accumulator have been replaced in the past couple of years. I bought an infrared thermometer to provide the AC folks with some data. AC starts off cold. 48 degrees coming out of the duct. Running down the highway an hour and it is now 68 degrees coming out of the duct. Another half hour and it is 78 degrees. A half hour later 88 degrees. Shut off the AC and drive a half hour, and start the AC and it's back to cooling at about 68 degrees. I think the compressor is freezing up. If so, why? What say the TFF?
"Any man who thinks he can be happy and prosperous by letting the government take care of him had better take a look at the American Indian".
Henry Ford
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Re: Truck AC issues.
[Re: KingwoodCat]
#11693459
06/28/16 03:20 PM
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Joined: Feb 2011
Posts: 5,809
Nathan "Bull" Montgomery
TFF Celebrity
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TFF Celebrity
Joined: Feb 2011
Posts: 5,809 |
Maybe the condenser is clogged with dirt/grime/debris? What kind of vehicle is it? I know on some of the Ford Super Dutys that if they are used offroad in dirty dusty condition the evaporator core inside the a/c case can become clogged as well. Id check that first.
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Re: Truck AC issues.
[Re: Nathan "Bull" Montgomery]
#11693478
06/28/16 03:30 PM
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Joined: Oct 2004
Posts: 38,822
KingwoodCat
OP
TFF Guru
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OP
TFF Guru
Joined: Oct 2004
Posts: 38,822 |
Maybe the condenser is clogged with dirt/grime/debris? What kind of vehicle is it? I know on some of the Ford Super Dutys that if they are used offroad in dirty dusty condition the evaporator core inside the a/c case can become clogged as well. Id check that first. Dodge 6.7 Cummins Mega Cab 4WD. Not operated in a real dusty environment though.
"Any man who thinks he can be happy and prosperous by letting the government take care of him had better take a look at the American Indian".
Henry Ford
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Re: Truck AC issues.
[Re: KingwoodCat]
#11693490
06/28/16 03:36 PM
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Joined: Jul 2012
Posts: 12,214
Cast
TFF Guru
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TFF Guru
Joined: Jul 2012
Posts: 12,214 |
It won't freeze with 48 degree air. It's broke again. The air should get colder but stay at about 40.
Cast I have a short attention spa
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Re: Truck AC issues.
[Re: KingwoodCat]
#11693492
06/28/16 03:37 PM
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Joined: Jan 2005
Posts: 7,491
redchevy
TFF Celebrity
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TFF Celebrity
Joined: Jan 2005
Posts: 7,491 |
Not sure if it is involved in the air flow to the cooling system componets or if it just filters the air coming into the cabin, but have you checked to see if your truck has a cabin filter? and has it been changed?
I changed the one on my last car at 100k for the first time and I'm amazed air even came out the vents that thing was so filthy. Just an idea to check, I have no idea if it could really be the problem or not.
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Re: Truck AC issues.
[Re: KingwoodCat]
#11693518
06/28/16 03:49 PM
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Joined: Feb 2006
Posts: 3,815
bronco71
TFF Team Angler
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TFF Team Angler
Joined: Feb 2006
Posts: 3,815 |
Have no idea about the Dodge but the Ford trucks I have had in the past had an orifice tube in the line that would clog up, especially after a compressor failure/replacement, changed it out and had cold air again.
I don't know what Toyota does different but I have had my Tundra for 10 years and it still blows cold as day 1 and I've never done a thing to it.
1987 Nitro MX185/Mercury Black Max 150 1999 Triton TX21/225 Mercury Optimax
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Re: Truck AC issues.
[Re: bronco71]
#11693634
06/28/16 04:31 PM
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Joined: Oct 2004
Posts: 38,822
KingwoodCat
OP
TFF Guru
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OP
TFF Guru
Joined: Oct 2004
Posts: 38,822 |
Have no idea about the Dodge but the Ford trucks I have had in the past had an orifice tube in the line that would clog up, especially after a compressor failure/replacement, changed it out and had cold air again.
I don't know what Toyota does different but I have had my Tundra for 10 years and it still blows cold as day 1 and I've never done a thing to it. The tube was the last thing that was replaced. It was clogged, but obviously not the real problem.
"Any man who thinks he can be happy and prosperous by letting the government take care of him had better take a look at the American Indian".
Henry Ford
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Re: Truck AC issues.
[Re: KingwoodCat]
#11694199
06/28/16 08:42 PM
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Joined: Sep 2012
Posts: 870
TITANIUM-BACK
Pro Angler
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Pro Angler
Joined: Sep 2012
Posts: 870 |
fist thing you need is pressure reading at idle with a/c on max with driver window down, then a reading at truck idling at around 2-2,300 rpm you can use a stick. Could be low charge, accumulator went bad. It doesn't matter what environment you drive in I have stuff come in here at the house looks clean but you remove the top plastic cover and start blowing stuff out you would be surprised at the [censored] that comes out of the radiator, charge air cooler and a/c condenser. All 3 of those things need to be clean in order to achieve maximum air flow across the a/c condenser.
Freedom isn't free, you don't have to love it or leave it, but respect the price paid for it. Master Caterpillar Field Mechanic. Retired
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Re: Truck AC issues.
[Re: KingwoodCat]
#11696051
06/29/16 07:18 PM
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Joined: Mar 2015
Posts: 134
TX0303
Outdoorsman
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Outdoorsman
Joined: Mar 2015
Posts: 134 |
Have you checked the blend door operation? Maybe it's opening up slowly and letting hot air in.
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Re: Truck AC issues.
[Re: TX0303]
#11696770
06/30/16 02:33 AM
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Joined: Oct 2012
Posts: 1,925
smooth move
Extreme Angler
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Extreme Angler
Joined: Oct 2012
Posts: 1,925 |
Have you checked the blend door operation? Maybe it's opening up slowly and letting hot air in. what he said.
es le bon ton roulet
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Re: Truck AC issues.
[Re: KingwoodCat]
#11698108
06/30/16 07:49 PM
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Joined: Jun 2005
Posts: 663
HaulinBass02
Pro Angler
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Pro Angler
Joined: Jun 2005
Posts: 663 |
Why was the compressor replaced? If it went out catastrophically, then the actual recommendation is to replace the condenser too. This is because the condenser lines on the newer vehicles are too small to flush out and debris can and will get trapped in there causing cooling issues. On my truck, the evaporator coil under the dash was dirty and it stopped blowing cold because it was freezing up due to moisture buildup in the dirt and grime. Basically the dirt and grime prevented the moisture to condense and drain away and it caused freezing on the surface. I had to pull the dash and replace it. I'm a DIYer and it took me 3 hours start to finish to pull the dash, replace the evap coil and the heater core (cheap insurance). I had to do the whole system though because the compressor was making funny noises too.
'99 Skeeter 186SX SC, 150 Yamaha VMax '13 Ford F-150 SCrew XLT, 4x4, 5.0, 6-spd
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Re: Truck AC issues.
[Re: KingwoodCat]
#11698362
06/30/16 10:52 PM
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Joined: Dec 2003
Posts: 37,175
Allison1
TFF Guru
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TFF Guru
Joined: Dec 2003
Posts: 37,175 |
Have you seen the drain putting out water. Just a shot but if its blocked it will do what you are seeing. Mine was blocked a couple years ago. After putting a little shot of compressed air the thing drained something like 3 quarts of water. A wire up the drain a couple times shook some junk loose and it hasn't occurred since.
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Re: Truck AC issues.
[Re: Allison1]
#11718315
07/12/16 02:07 PM
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Joined: Oct 2004
Posts: 38,822
KingwoodCat
OP
TFF Guru
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OP
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Joined: Oct 2004
Posts: 38,822 |
Have you seen the drain putting out water. Just a shot but if its blocked it will do what you are seeing. Mine was blocked a couple years ago. After putting a little shot of compressed air the thing drained something like 3 quarts of water. A wire up the drain a couple times shook some junk loose and it hasn't occurred since.
Draining fine. I'm taking it back to the mechanic on the 25th and giving him instructions to fix whatever it is. I moved to the lake last week in a truck that the AC lasted for an hour at a time on a 2 1/2 hour trip. This is what I know about the AC. It starts out when it is cool outside early in the morning and puts out 45 degree air (Infrared thermometer). Running down the highway and within a half out the output temp is 60 degrees. Another half hour and it's 75 degrees. At that point I turn it off for a half hour, start it back up and its putting out 65 degree air for about 20 minutes, then it goes back to 75 degrees.
"Any man who thinks he can be happy and prosperous by letting the government take care of him had better take a look at the American Indian".
Henry Ford
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Re: Truck AC issues.
[Re: KingwoodCat]
#11718404
07/12/16 02:44 PM
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Joined: Jul 2012
Posts: 12,214
Cast
TFF Guru
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TFF Guru
Joined: Jul 2012
Posts: 12,214 |
That is annoying. I parked my GMC when the AC went out.
Cast I have a short attention spa
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Re: Truck AC issues.
[Re: Cast]
#11718774
07/12/16 05:56 PM
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Joined: Oct 2004
Posts: 38,822
KingwoodCat
OP
TFF Guru
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OP
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Posts: 38,822 |
That is annoying. I parked my GMC when the AC went out. I can afford to let it set up until the last week I am in Houston as I am retiring at the end of the month. The plan is to drop it off at the mechanic shop and let them keep it until they've fixed it.
"Any man who thinks he can be happy and prosperous by letting the government take care of him had better take a look at the American Indian".
Henry Ford
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