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BD · 08-26-2008, 06:24 PM

It's semi true....when they put a vacuum pump on it to evac, they can pump it up and stop and keep the guage on it to make sure there are no leaks in the reefer system.

The main test to make sure the compressor works, which means it creates the delta P it is designed to create (pressure differential between the high and low side), is to have it charged with the correct amount of refrigerant and measure the high and low side. You can't do that unless you have the refrigerant in there.

So yes, to make sure the compressor is good you need to have the system evacuated and charged.

HOWEVER, $380 is BS....shouldn't be more than $100. The 134a to charge your a/c system costs him like $5 and it takes like 15 minutes to vacuum out the system. And 'convert' means simply putting different oil in there.

08-26-2008, 06:24 PM	#2 (permalink)
BD Digital Racer Join Date: Mar 2007 Location: Durham, NC Posts: 740 Car: 98 DX coupe and 99 EX coupe Mods: Both stock	It's semi true....when they put a vacuum pump on it to evac, they can pump it up and stop and keep the guage on it to make sure there are no leaks in the reefer system. The main test to make sure the compressor works, which means it creates the delta P it is designed to create (pressure differential between the high and low side), is to have it charged with the correct amount of refrigerant and measure the high and low side. You can't do that unless you have the refrigerant in there. So yes, to make sure the compressor is good you need to have the system evacuated and charged. HOWEVER, $380 is BS....shouldn't be more than $100. The 134a to charge your a/c system costs him like $5 and it takes like 15 minutes to vacuum out the system. And 'convert' means simply putting different oil in there. __________________ there are three things: power, reliability, and money. you can only have two.