01 Taurus AC Cycling

My 01 Taurus has an AC problem.
My AC was slowly getting less cool, until finally it just didn't cool at all any more. In fact it was blowing warm air, warmer than ambient
temperature. I took it in, figuring it just needed a recharge. They ran an leak test and identified a small leak in the hose coming out of the accumulator or drier. Fair enough. They put in some more refrigerant with some leak stop stuff in it, and sent me on my way. Over the winter I didn't use the AC.
Now that it's getting warmer I tried out my AC, no dice, just blows warm air. I decided to get some refrigerant to fill it myself. I hooked up the can to the low side and the pressure was very high, about 110psi. Needless to say I didn;t add any refrigerant. In addition to that my compressor seemed to cycle on and off every 3 or 4 seconds. Still just blew warm air.
What am I looking at for solutions here? I don't mind getting a new accumulator and hose assembly for $110, but could it be the compressor instead? Thats significantly more pricey.
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On 24 Feb 2007 14:07:37 -0800, snipped-for-privacy@gmail.com wrote:

No offence, but they don't never "just need a recharge", 'tho that'll sometimes do in the short-term. There's always a reason they are losing charge.

How much warmer?

Doesn't sound like compressor, but I lack info.
You might wanna consider:
a.) Get specs on lo, hi side pressure. b.) Measure same to see if in tolerable range.
The repair shop might've overcharged the system. If it has a hi- pressure switch, you might just need to evacuate some refrigerant or somesuch (best case scenario).
Could maybe jumper hi-pressure switch for quick/dirty test, but I wouldn't leave it like that for more than a few seconds ...
Cheers, Puddin'
"Life is nothing but a competition to be the criminal rather than the victim." - Bertrand Russell
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I have the service manual for my car, so I perused the AC section. I went out and depressurized the low and high sides. Then I hooked a jumper to the compressor switch so that it would remain on instead of cycling. I then refilled the refrigerant and what do you know, it's cold. Looks like a bad compressor switch. Thats a hell of a lot cheaper than a new compressor. Thanks for the suggestions.
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On 24 Feb 2007 15:23:02 -0800, snipped-for-privacy@gmail.com wrote:

Near as I can tell, you didn't need to depressurize to do the jumper test.
I thought of the compressor switch and likely should've mentioned it, but I hadn't heard of any of 'em failing.
You have a proper pressure gauge-set? You get readings within tolerable range? This is important.
I wouldn't leave it jumpered long, even if pressures are OK. If you're sure it's the switch, replace it ASAP and be done with it.
Hope you nailed it.
P
"Life is nothing but a competition to be the criminal rather than the victim." - Bertrand Russell
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Puddin' Man wrote:

charge is.

and chase your tail until you figure out it's cycling out of range. Not that it's ever happened to me....<cough..cough>. I see about 5 per season here in Ohio. They usually just go open, but they sometimes cycle at the wrong pressures.

much narrower than on the old school R-12 systems.

will either not cool well due to undercharge, cool just right, or the compressor will disintegrate due to being overcharged and/or air in the system.

po li'l ole self ain't too bright sometimes", you did pretty good on this one. A lot of DIYers don't know AC beyond "... it probably just needs recharged..." C'mon, admit it! You've been paying attention to the stuff you read here. ;) Regards, Tom

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R-22?? now yer gettin outta cars and into home appliances.. LOL Only auto a/c's I have seen were R-12 and R-134a systems.. Now I have seen HFC-236, R-22, R-12, and R-134a used in home appliances as well as stationary industrial equipment..
Ford Tech
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wrote:

R-22 could work in cars, I'd have to get out the charts and look to see if there are any good reasons why you couldn't use it. It's medium temperature like R-12, and mineral oil compatible... There are a whole raft of refrigerants out there that are perfect for some jobs but lousy for others.
They've done crazier - people put Propane in their car AC as a 'replacement' refrigerant for R-12, and commercial systems have run on Ammonia for decades...
--<< Bruce >>--
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Just garden-variety residential central AC for po' me ...

Same here.

More'n I've seen, but I don't get around that much (retired).
The basics are all the same? Evaporator device(s), compression device(s), lines, refrigerant(s), supporting elec. systems, etc?
Prost, Puddin'
"Life is nothing but a competition to be the criminal rather than the victim." - Bertrand Russell
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