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I just finished replacing the condenser and the high pressure hose on my daughter's A/C. This is a different car than the one I posted on for the last month with different problems. I drained the compressor, filled the system with 200ml of PAG 100 oil and 950ml of R134A. The accumulator got cold, the cabin temp. did not change much, and the condenser got very hot and the pressure got quite high. Then there was a release of a small amount of PAG oil and a mist of R134a for a short while behind the compressor. I realized then that the fan was not working (maybe I'm getting too old for this stuff)!
The heater control valve was replaced last year and it is working fine. For some unknown reason, the evaporator does not seem to be working very well because the cabin temp. does not come down much even though the accumulator gets cold. I wonder if the evaporator is completely blocked or just dirty or ?
I started the car up after the release of oil and R134a and the compressor kicked in again and the accumulator got cool again. So, evidently there was a high pressure release of the back of the compressor??? I'm pleased that I didn't blow up the new Nissens condenser.
Any ideas would be appreciated. Some questions I have are:
Is there a pressure relief valve on the back of the Seiko compressor since I had a release of oil and R134a there? Nothing seems to be blown up and there is still pressure in the system.
So, why didn't the fan run? I used a paper clip to check the grey low speed sensor and brown high speed sensor wiring and the fan kicked in for each sensor. Does anyone know what pressure the sensors are supposed to come on typically and is that pressure the high pressure part of the system? I guess I am wondering how I can check these sensors. The violet one may be bad also. I think it should have shut off the compressor at some pressure and not allowed my debacle above blowing off R134a and oil. My wiring diagram (actually a 1994 diagram) shows that the violet sensor is "A/C High Pressure Sensor" and is normally closed. I couldn't find the violet sensor (high pressure) on my 1993 Mitchell wiring diagram but assume it is the same as the 1994 diagram.
How can the evaporator not be cooling the cabin if the accumulator is getting cold?
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Mine:5-940s running, 2-740, 2-940 parts, dtrs:3-940s running
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