A/C issues

Good afternoon,

Is the clutch engaged with those readings?

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

If it is, the compressor is bad.

If it is not then we need to find out why the compressor is not engaging.

I attached a wiring diagram and the location of the relay if we need to do testing.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Roy

The clutch does not disengage unless the system is turned off.

It should only engage with the engine running and the A/C commanded on.

Can you explain what you mean?

Roy

Also, cold air blows from the passenger side, but cool blows from the driver's side. The lines in/out of the dryer are cold and have condensation, and the lines around the high pressure port are very hot to the touch.

it engages when the system is on, and disengages when the system is off, but it does not cycle when the system is on. I expect the clutch to engage and disengage as the sensors monitor the flow of refrigerant.

The readings you gave me show that either the compressor is bad or the system is not on.

Can you recheck those pressure readings with the A/C on and the engine running?

Roy

Okay, reconnected and tested the pressures with the gauges closed this time (rolls eyes). 40 low, 225 high, about 85 degrees ambient.

Okay, they are both a little high.

The high side should be 2 times ambient plus 15%.

The low should be 25-30 rock solid.

Looks like it is overcharged.

Roy

bled off pressure as indicated, no change.
Clarification, pressures are now 30/195, no change in cooling.

Did you take it for ride and see if it cools down?

What is the duct temperature?

Roy

idling it's cool, driving above about 30 it gets warm. don't have a vent temperature thermometer.

How much Freon did you install and how long did you vacuum the system?

Did you add any oil?

Roy

I had a mechanic do it. When i replaced the compressor, it came with oil, then I added about 3oz. I slept on it and realized it was too much oil so I paid to have it flushed and filled.

Did you add the oil to the Freon side or into the compressor?

Roy

I added by way of suction into both high and low pressure port. I drew a vacuum then let the vacuum suck it in through a tube from bottle to port.

Okay, 3 ounces was good to add for what you replaced.

How long did you vacuum the system?

Roy

i brought it down to -5 and held it there for about 10 minutes. then closed off the vacuum and made sure it held -5 for about 5 minutes.

No, it needs to pull 30 for at least 45 minutes to boil all the moisture out. Then add the exact amount of Freon called for.

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Roy

I had it redone by a mechanic after I did it.

Okay, hopefully he did it right. From the readings, it is either too much or moisture in the system.

Your pressures came down but bleeding it off is the wrong way to do it.

If he added the correct amount then now you are low in Freon.

Roy

I'm not convinced he actually did what I asked for. he said originally it was low on Freon, i'm afraid he just added some and raised the pressure. I had it at 35, but he put it at almost 50. sounds like i need to take it back.

50 is way high as well as 35. Like I said, it should be 25-30 pounds and rock solid.

Roy