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Old 05-19-2013, 17:30   #1
Rec4LMS
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Problem with recharging the AC in a Ford Tarus...

I like to think that I have a little automotive mechanical skill. Unfortunately, I purchased a 2005 Ford Taurus back in 2005... Other than having to replace the altinato, I've had to do nothing to the engine except basic maintenance. (Oil, tire, belts, spark plugs, et al.)

Unfortunately, I'm starting to run into problems. (I'm going to skip the issues with replacing the radio because I'm pretty weak at electrical issues all in all.) Today I tried to recharge the AC. (It's not cold.) Ran the engine, turned the AC on max, and hooked up the refrigerant to low-side service port. Should have been good, but when I hit the button there was no flow of gas into the system.

So... What is the problem that I'm looking at? I don't have a tool to check the pressure in the AC system. (I'll need to pick one up tomorrow.) I'm hoping it's not a mechanical problem, as I prefer a cheap solution. But if I can't recharge the AC...
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Old 05-20-2013, 10:22   #2
ManWitaBigStick24
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Without any gauges it would be a guess, but if your high and low side psi are about the same probably a compressor. If its not taking a charge I would start at the TXV or thermal expansion valve. You also could be over charged, check the front of your condenser maybe melted plastic shopping bag melted into it I have seen this before.
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Old 05-20-2013, 11:03   #3
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You probably have a bad o ring in a line. Find a competent ac shop and let them fix it unless you have the line tool, vac pump, gauges and refrigerant. Replace all serviceable parts.

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Old 05-20-2013, 18:31   #4
1955mercury
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Hi Rec4LMS. Is the compressor clutch engaging? There's a pressure switch on the lines that has to make before the clutch will actuate. If the freon is real low, the pressure want be enough to make this switch and the compressor want pull the pressure down enough on the suction side for it to be lower than the freon container you're trying to charge the system with. Just a wild guess. And if you're charging it with those small cans, try putting the can in a container of hot water and run your garden hose on the condenser coil while you charge the system.
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Old 05-20-2013, 20:54   #5
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Too much refrigerant can have as many issues as too little, starting with blowing seals. The only certain way to know if you've got enough refrigerant is to weigh it, like the pros do. Depending on how long the system has been open, you proably need a new receiver drier and the POE oils commonly used can undergo hydrolysis and themselves become corrosive in addition to the water trapped in system. Getting a pro to charge it with the right equipment can save aggravation and damage.
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Old 06-05-2013, 20:13   #6
Maxx702
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Quote:
Originally Posted by swoh View Post
Too much refrigerant can have as many issues as too little, starting with blowing seals. The only certain way to know if you've got enough refrigerant is to weigh it, like the pros do. Depending on how long the system has been open, you proably need a new receiver drier and the POE oils commonly used can undergo hydrolysis and themselves become corrosive in addition to the water trapped in system. Getting a pro to charge it with the right equipment can save aggravation and damage.
Not to mention the importance of evacuating any existing refrigerant then placing the system under a vacuum before recharging.

IMO those do it ourself charge kits are pretty useless nowadays on the newer systems with such smaller capacities.
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Old 06-05-2013, 22:35   #7
Oscar23
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+1 to checking to see if the compressor clutch is even engaging before trying anything else.
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Old 06-06-2013, 07:22   #8
Rec4LMS
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Quick update. I had overcharged it when I assumed that it was low on refrigerant. The system was evacuated and recharged properly.

So, now it works "more often." It still has intermittent outages. The clutch appears to be engaging, but when the system shuts off it always takes a bit to get a spot to pull over. (It does not help that the system is almost underneath the engine.) The shop can't find the problem because it is intermittent. However I will note that one of the guys let me know that they had seen a similar issue with the Taurus where the AC failure was due to a bad electrical ground.

I'm half thinking of pricing a new clutch and condenser and trying to swap it out myself. (Where did I put my penetrating oil?) But knowing my luck, something else would be the problem. LOL!
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Old 06-06-2013, 21:26   #9
1955mercury
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I'm curious. Why do you pull over and what do you do when you pull over? And what leads you to believe it is the clutch and condenser that is your problem? If the clutch is engaging, I wouldn't think that would be your problem. And the condenser is basically like a radiator, if it's clean and not leaking, it should be fine. Is your interior fan blowing air or does it stop blowing? Can you give a more detail description of what's going on when it quits on you?
Also in your first post about this problem you stated you couldn't get any Freon to go into the system. So how could you have overcharged it, if you couldn't put any in it?

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Old 06-07-2013, 16:12   #10
vikingsoftpaw
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Ford Taurus' AC compressors are notorious for defective o-ring seals. My AC system held a charge less than 24 hours. The solution is to replace the compressor.
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Old 06-08-2013, 14:08   #11
1955mercury
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Quote:
Originally Posted by vikingsoftpaw View Post
Ford Taurus' AC compressors are notorious for defective o-ring seals. My AC system held a charge less than 24 hours. The solution is to replace the compressor.
But Rec4LMS states the problem is intermittent. O-ring seals will not cause an intermittent problem. If they are bad, the Freon will leak out and the system quits working.
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Old 06-08-2013, 17:44   #12
Remington 870
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Dear op you need to do a total reclaim of the refrigerant in your system. Then pull a vacume for at least 1 hour. Then find out where your leak is. Most of the time its the condenser up in front of the radiator. Or the evaporator up in the dash area. Or possibly a hose. But that is the basics. When there is a large leak in the a/c system you have a pressure not a vacuum and that will prevent new gas from entering your system.


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