Although I have done this on past cars (non Xfire) , I have waited too long to put a partial fill in this case. That is the compressor has automatically been stopped from cycling due to too low pressure in system. Does anyone know if the compressor needs a jumper procedure like the older systems (at the low side cycling pressure switch w/only two wires involved) or do these newer cars that use the high pressure sensor to apply fans,compressor rotation, etc. (three wire type) use a more upscale method to cycle the compressor when it's been taken off line due to low pressire in system, in order to have R-134 pulled into the low suction port? This is not a sudden shutdown due to a part failure. The freon has eased it's way out of the lines over many long months, but I should have known better & not let it go so long without giving it a little drink before last fall ended. Thks.

 

While I can't say for sure, but the above tells me that the low-pressure cutout switch is preventing the compressor from engaging. And that you will need to jumper it to get it to start. Might not be a bad idea to also add some oil. Remeber to purge the lines.

 

First - is the system completely empty or does it have some pressure in it? That is an important question.

If the system is completley emptly, zero pressure, then there is a good chance that moisture has entered the system. With that you need to repair the leak(s) first, then vacuum the system down to remove any moisture.

If the system does have some charge left in it, then you shouldn't have to vacuum it down. However you should really try to repair the leak(s). I have not worked on the Crossfire A/C specifically, so it is possible for some corrections here.

You are probably correct that the low pressure swich is not allowing your compressor to kick in. I would think this systems pressures are monitored by the ECU or BCM or some module.

I assume you are using 134a cans to refill. Start the engine and turn on the A/C. If the system is not totally empty, adding 1 can will usually be enough to cycle the compressor on and off. If one can will not activate the compressor clutch, try a second. If a second can will not turn on the clutch, you may have other troubles. 2 cans should be enough to close the low pressure switch.

As for gettting it to the proper level, I am not familiar with this car yet. Refer to the manual. And as mentioned, be sure to add a can of proper oil sometime during topping off your system.

To get the exact amount of freon in the system, you need to start with an empty system and measure the amount going in by weight.

I hope this helps. James

 

James is correct, however it is not always necessary to add oil to the system especially if it's a slow leak. Too much oil in the system is not a good thing. Secondly most new cars have both a low and high pressure switch. The low pressure switch if the system is low on charge and high pressure pressure activates the condensor/ radiator fan or fans.
You really should attempt to find the leak and have it repaired, if moisture gets in the system it forms an acid and eats everything from the inside out !

Good Luck

 

if the low pressure cutoff is stopping the compressor start filling high side with liquid bottle upside down untill compessor starts gauges recomended in case of other problems

 

Just An Opinion Be Careful When Dealing With The High Side On A/c You Could Possibly End Up With A Blown Up Can In Your Hand Not A Pretty Sight

Good Luck On Your Repair