Troubleshooting help needed-AC pressures

67Dart273 said

If low side is that high, and I assume it is not cycling on the low pressure switch, it is not starved for refrigerant, particularly. Also with low side that high, the metering is not plugged, AKA frozen or debri in the valve/ orifice

You sound like you have some knowledge, but I have to ask, just exactly how did you charge this, AKA what precautions do you take when charging not to slug the compressor?

I do this: With system in a vacuum, and to introduce charge, I always charge liquid into the HIGH side from a vacuum, without powering the system. This gets you an initial charge. Some modern refrigerants (410A) are meant to be charged as a liquid because of their "chemical mix." So you must be CAREFUL and throttle the charging valve to insure you are not slugging the thing.

You are absolutely certain the compressor is running, AKA that the clutch doesn't have a problem?

Click to expand...

The manual shows a picture diagram (could be an old generic drawing) which depicts an expansion valve, not an orfice. This is an answer to a previous post by another member.

You are correct...I have some knowledge on this...some, not enough.

As to how I charged it, well unfortunately the instructions they gave do not say which port to use so I followed the instructions on my freon can which stated "Do NOT connect to high pressure side as pressures greater than 170psi WILL cause can to explode". It instructed to connect to low side, have system on and to agitate the can from side to side. I followed those instructions. I never heard any loud noises like the compressor was slugged or anything. Engine never changed rpm, etc., and it did work for like I stated as tested several times over a few weeks. I suppose it is possible the compressor was damaged somehow and now failed but it does not make any unusual noises. Oh and yes the clutch engages and the compressor rotates as evidenced visually and that the pressures were not static or equal. I now see there was a warning on the instruction manual to not shake or tilt the can which contradicts the instructions I followed on the freon can.