Question about 1996 Cadillac DeVille

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Recently added a leak stop r-134a freon to my 1996 deville and after about 2 days the compressor wont turn on and it wont go to "auto" cool and stays on "econ" cool. after adding freon to car i noticed it was misting out the low pressure line where i added it as if it was to full and i overfilled it. what do i do now to fix it?

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If it's misting, this is a definite indication of an overfill. You should get a hose with pressure guage on it to avoid this. In the meantime, if a dangerous condition exists within your compressor. The optimal amount of pressure you're looking for is in the 40-45 psi range. Definitely needs attention or you will do damage to the system. Best of luck.
Greg

Posted on Jun 25, 2009

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2 Answers

Added freon to ac and car will not cool


Needs to be checked for a freon leak, best way to do this is to recharge and add dye, with a uv light you will be able to fine the leak, most auto parts sell the dye, and the flash light you will need to fine the leak, good luck.

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Below is a guide to troubleshoot and check system function. This can be done by most folks.

Look at the front of the ac compressor and have someone turn on the ac from inside the car. The front of the pulley(clutch) will spin when turned on.

If it does not spin, the low pressure switch (LPS) is not satisfied. Meaning there is not enough freon in the system to operate the system. Means low freon capicity because of a leak.

The LPS can be jumpered to cause the compressor to run (clutch to engaged) which will draw the freon in the system.

The LPS is usually a two wire sensor on the suction of the compressor. (between evaporator and compressor) Unplug the sensor and install a jumper, this will engage the clutch. Connect a new can of freon
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The system should be filled until suction pressure is about 30 to 38 psi..

Remember the flow for the a/c system is :
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2. From the condenser a HP liquid goes to an expansion device (orifice tube or expansion valve)
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1 Answer

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first check your fuses and any relays sometimes you have multible relays that are the same in a fuse box that you can switch around but i would bet you have a leak either in your compressor or in your line if the clutch is not kicking on and off or running all the time when you turn it on thats because your freon has leaked out the system is sealed freon does not go bad if there is no pressure in the system it will just blow warm air your question is vague so if your blower is not blowing bad blower motor or a fuse if warm not getting cold your system has a leak if you have not broke the system you can try stop leak 2 cans to seal a leaky compressor compressor could be bad if it wont spin noisy clutch could be bad need new compressor but if a leak after stop leak add the right amount or r-134a 2 to 3 cans if the compressor kicks on on the first can of stop leak or freon your system did leak down and you hope the stop leak fixes it but first check all your lines are tight and that the freon is not leaking from the high or low pressure ports the valve can leak sometimes make sure your caps are on take some spit after you add freon back into your system see if your spit blows a bubble if it does replace or tighten the valve. a few things to check start with power fuses then add a can of freon if you have power now clutch engagement if you add and kicks on there is the reason a leaky system it will all leak back out in a day or several days... thats why you can add the stop leak things you can try or take it to the shop and pay someone some $$$$$

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1 Answer

Air cond. Compressor doesn't turn on Is there a separate switch?


Well yes, there is a separate switch. If the A/C system is low on freon, the low pressure switch will keep the compressor from engaging to save it from damage due to no lubrication. The freon helps with lubricating the compressor. Get you a can of 134a from the parts store and add a little to see if the compressor will come on. It should come on before one can is used. Now for the freon to be gone means you have a leak. So if the can gets you cooling, try to find the leak so you can stay cool.

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2 Answers

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You probably have leaked out your freon after so much time. Try adding some more Freon if it doesnt stay charged you may have bigger issues.

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1 Answer

The ac only blows warm air, have recharged it with freon but it only cools minutes before blowing warm again, could find no leaks


There are special cans of R-134A with dye in them for detecting leaks. Most leaks occur around the fittings near the compressor. Recharge the system with the leak detector can or R-134A. There are also cans of R-134A with an additive to stop leaks. I would use these products to either detect your leak or to stop it. Best of luck.
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1 Answer

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Put more in. Keep adding untill it won't take any more. You can't over do it with those cans. It'll either work or you'll find the leak if it really has one.

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2 Answers

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39 0Z R12 (If it has not been retrofitted to 134A)
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Please take time to rate this fixya

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1 Answer

No air on 93 taurus using 134a, compressor does not engage


you are probably low on freon again. If the system is low, the pressure switch won't turn on the compressor. Add a can of R134A using a hose that has a gauge on it. It should read in the "Good" area if you have enough freon. Adding a can will probably be enough to start it working. If so, look for a leak somewhere, usually around connections where O rings leak.
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1 Answer

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