A/C Refrigerant - ZR-1 Net Registry Forums

bb62 · 07-04-2020

I am trying to add refrigerant to my ZR-1(1995). There was previously under 10 lbs of pressure in the system. On my first 12 oz. can (which is not finished), the gauge reads well into the yellow zone (over 50 lbs). Theoretically I am not supposed to add to a point where the gauge reads in the red zone.

The car itself was turned on with the A/C system on. The A/C system was not cycling at that point at all. With the partial can, I am getting a clicking every 5 seconds or so, but no cold air. Since the system requires 2 lbs (or more than 2 cans) there is no way that it is full so I can get cold air, but why is the gauge nearly in the red. It is 86 degrees here (Fahrenheit). Thoughts?

jss06c6 · 07-05-2020

Your description is a little confusing..

Do you have a set of gauges that can read both high and low side pressure? Not sure where you are seeing yellow or red on you're gauges.

Static pressure (compressor not running) on the system after it has completely equalized (high and low side read same) will be around 90-95 psi on a fully charged system.

On an 85 degree day, with a full charge, you should see about 190 - 210 psi on high side and 30-31 psi on low side.

Did you evacuate the system or simply add R134A? If evacuated, did you put a vacuum on the system for about an hour before fresh freon charge?

Did you get a -09 code indicating low freon? If you only had 10 psi, you've got a pretty big leak somewhere.

Sent from my SM-G950U using ZR-1 Net Registry mobile app

07-04-2020	#1
bb62 Join Date: Oct 2008 Location: Michigan Posts: 129	A/C Refrigerant I am trying to add refrigerant to my ZR-1(1995). There was previously under 10 lbs of pressure in the system. On my first 12 oz. can (which is not finished), the gauge reads well into the yellow zone (over 50 lbs). Theoretically I am not supposed to add to a point where the gauge reads in the red zone. The car itself was turned on with the A/C system on. The A/C system was not cycling at that point at all. With the partial can, I am getting a clicking every 5 seconds or so, but no cold air. Since the system requires 2 lbs (or more than 2 cans) there is no way that it is full so I can get cold air, but why is the gauge nearly in the red. It is 86 degrees here (Fahrenheit). Thoughts?

07-05-2020	#2
jss06c6 Join Date: Aug 2015 Location: Magnolia, Texas Posts: 884	Re: A/C Refrigerant Your description is a little confusing.. Do you have a set of gauges that can read both high and low side pressure? Not sure where you are seeing yellow or red on you're gauges. Static pressure (compressor not running) on the system after it has completely equalized (high and low side read same) will be around 90-95 psi on a fully charged system. On an 85 degree day, with a full charge, you should see about 190 - 210 psi on high side and 30-31 psi on low side. Did you evacuate the system or simply add R134A? If evacuated, did you put a vacuum on the system for about an hour before fresh freon charge? Did you get a -09 code indicating low freon? If you only had 10 psi, you've got a pretty big leak somewhere. Sent from my SM-G950U using ZR-1 Net Registry mobile app