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Why a/c sistem is acting like someting stop completely the flow of refrigerant,

(1996 Ford Escort)
in Yuma, AZ on August 05, 2013
a/c is on high side gauge go up to the maximum pressure fast then the compressor desingage then when pressure go back turns on again to do the same, I replase the orifice tube twice, clean the system twice, w/air pressure check flow and it has exelent flow in all the lines including condenser and evaporator, hope for help I am getting crazy.
Displaying 1 answers & 5 comments
Popular Answer
Make sure the electric condenser / radiator fan is coming on.
on August 06, 2013
justin, fan is on, on high speed, and the day I charge the unit with refrigerant that day work's exelent, the problem is the next day, as soon as I start it, start doing the same problem again,!!!! I think I need a car exorcist, do you know one!!!! I will appreciate any suggestions. thank u.
What pressure does the high side go to when the compressor shuts off? What is the low side pressure at this point and at what pressures does it come back on?
If there is a blockage then the low side should be starving (very low). The easiest way to find a blockage is to check the temperature along the hoses and condenser between the compressor and orifice tube. The blockage will act as an orifice tube and it will go from hot to cold at that point. The new style condensers are almost impossible to clean due to the design.
Did you do any other repairs to the A/C system or just a refill?
on August 07, 2013
ok justin, I thing the block of the flow is in the orifice tube, b4 the tube temp. 170F after tube 95F,when on, compressor take only 5 seconds to cut out at 475 lb. and start again at 250 lb. and this is the 3rd orifice tube, and the 2nd time I clean the system, every time the problem is the ( next day) and that next day fact is what make this nonesense, I been doing a/c work sice 1980 and I never had nonesense problem like this, I still think I can try the exorcist, thank u.
Well first of all a good prayer will always help.
If the orifice tube is plugged each time you pull it out you may have the dreaded Ford FS-10 compressor "black death". Basically the compressor goes bad and the rings on the pistons melt and get stuck in the system. The "junk" will solidify and plug the condenser. The problem is it can not be flushed out, it will need to hit around 300 degrees fahrenheit to become a liquid again so it will move. Anyways... If the orifice tube is plugging I have had luck installing an inline filter either before the office tube or one with the orifice tube built in, get one as big as will fit, I don't even know if these are available anymore. It is something like a Factory Air #16150 but larger around with a built in screen. Most likely you will need to replace the condenser also and if the compressor has not been changed and is making noise do that also. Now I'm going back along ways from memory so please don't spend a lot of money on my guess.
on August 08, 2013
ok justin, every one of the orifice tubes that I pull out came out clean and open,right now I am working in cleaning 150% the radiator and condenser, a frend sugestion, I let you know the results, thank u.
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