Question about 1993 Ford Econoline

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Need to charge the air

Were is the low pressure line to charge the ac in my 1993 ford econoline v6 , and why would the clutch keep kicking on when the air is off

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I just found the one on our van same year and model. It is all the way over on the right behind the two big air hoses hooked to the air breather. Looking at the compressor go over a few inches and then up and there it is.

Posted on Jun 01, 2009

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It should be right in the center of engine compartment just past the cowl

Posted on May 21, 2009


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1993 Mazda mx3 v6.The a/c compressor does not turn off, even with a/c and fan switch in off position, a/c compressor keeps working. I checked out the relays and wires but I found out nothing.

Do you have automatic temp control? Is the defrost selected? If no then pull the AC compressor relay and swap it with another relay in the fuse box, if it shuts off replace the AC clutch relay. You can also try unplugging the low pressure switch in the low pressure AC line.

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I have a 2001 Ford Mustang V6, the ac is blowing warm air. We checked the refrigerant and it is full. The ac compressor will kick on for a few seconds and then kick off. Why is the compressor not staying...

it's either low (in spite of your readings) or your a/c clutch is not working correctly or you have too big an air gap in the clutch.
First, just disconnect the 2 pin connector from the a/c pressure cycling swithc and jumper the 2 pins with a wire to force the clutch to stay engaged. See if it blows cold then, and stays engaged. You can run this way for about 15 minutes before you have to pull the plug.
report reulsts.

please don't forget to rate.

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Low charge or bad sensor telling the system it has low charge, or dryer is clogged.

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Oct 19, 2009 | 1993 Ford Econoline

1 Answer

My AC compressor cycles on/off 1993 Thunderbird

I'm believe he's talking about a dessicant bag. That year didn't have it. sounds as simple as a bad clutch cycling switch. that's the way a bad one on fords act a times.

Sep 03, 2009 | 1993 Ford Thunderbird

1 Answer

Need to know if my 1993 ford club wagon is r-12 or r-134 is there any way to tell from fill ports? the r-134 CANISTERS FIT ON THE LOWSIDE, ARE THE R-12's a different size?

If it is a quick connect fitting, it is R-134a
The low(charge) side fitting is: 13mm
The high side fitting is: 16mm

If it is a threaded fitting with threads on the outside, then it is the older R-12 refrigerant and can only be serviced by a licensed air conditioning service.

The low(charge) side is 7/16" threads
The high side is 3/8" threads

When servicing your air conditioner it is best if you have gauges, but it can be done without, just be careful.

Assuming the air works, but just not putting out that much cool air, then 1 or 2 cans of refrigerant won't hurt.

If there is no pressure/refrigerant in the system at all then it is usually a sign of a leak and should be taken to a pro because you may need to replace the receiver/dryer and have the leak fixed. The system needs to be evacuated for maximum efficiency if there was a leak or if hte system has been opened.

Adding too much refrigerant can be catastrophic as the high side pressures can reach 200-300psi on a hot day. So if you happen to have a low side gauge, and it reads somewhere between 35-45 with the Ac operating, you are golden.(tire gauge won't work)

Don't be surprised if the compressor doesn't kick on right away. Some vehicles are equipped with a pressure switch to keep from damaging the compressor if it runs low. Usually after adding one can, it is enough to engage the compressor.

Hope this helps.


Aug 21, 2009 | 1993 Ford Econoline

2 Answers

Truck AC keeps kicking off

Have you tested the presure in the system? Check the condensor, (is it clogged or restricted, also check the clutch fan. With engine NOT running, move the blade up and down. You should feel a resistance and there should me no lateral (front to back of vehicle) play.

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Clutch short cycles and air comes on a off.

From what you're describing, it sounds like the AC system needs a refrigerant charge.
Many car owners are doing their own AC
charge by purchasing a re-charge kit at the local auto parts store. A small gauge is also available (looks like a tire gauge) that attaches to the low side of the AC system, that gives you a reading of the system's charge.
The low side of the system is the larger metal hose line coming from the compressor. It has a fitting and cap on it. The high side is the smaller diameter metal hose.

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