Jul-26-2021 07:18 AM
Aug-09-2021 06:25 AM
rgatijnet1 wrote:
I always just used a good temperature probe in the AC duct and added refrigerant very slowly and watched the temperature. As soon as it got to the lowest temperature and started to retreat, I stopped adding refrigerant. This worked well for me with my Classic cars with Freon 12 as well as with the R-134a. Then again, I'm no expert and was only interested in cold air from my AC unit.
Aug-09-2021 06:17 AM
Aug-08-2021 07:39 PM
dodge guy wrote:
A good AC guy knows how to read gauges (and I am one of those people). You have to know outside temp and humidity and have a chart to compare that to the pressures on your gauges as well as the vent outlet temperature. It can be done with the right person. Sadly not many like that left anymore!
Aug-08-2021 04:41 AM
Aug-07-2021 09:04 PM
Aug-07-2021 03:06 PM
Rick Jay wrote:
JRscooby,
I agree, and this was mentioned in the first page of posts. It would be relatively easy to add a manual shut-off valve on the inlet hose of the heater core, if there's not one already installed. It doesn't take much hot coolant leakage to overpower the cooling ability of the A/C. Buystockinfun, if there is already a manual valve installed, try shutting it off to see if that helps.
Though, that wouldn't account for your low pressure readings being on the low side.
Good Luck,
~Rick
Aug-07-2021 10:41 AM
Aug-07-2021 10:07 AM
Aug-07-2021 03:33 AM
Aug-06-2021 08:48 PM
Aug-06-2021 08:30 PM
Aug-05-2021 05:04 PM
dodge guy wrote:dougrainer wrote:dodge guy wrote:
Sounds like it’s low on refrigerant. You would need gauges to accurately see the pressures and determine how much it needs.
From the EXPERTS on the link I posted. Gauges are good but you CANNOT accurately determine the correct charge. As I stated, TOO MUCH coolant will cause low output as well as LOW coolant. Gauges cannot be that accurate to determine that. You can get close but close will not give you the BEST cooling other than an exact charge. If I was paying somebody, I want the BEST not close. Doug
From the link.
the only way to be certain of an exact charge is to fill an empty system with the
specified amount of R-134a refrigerant.
A good AC guy knows how to read gauges (and I am one of those people). You have to know outside temp and humidity and have a chart to compare that to the pressures on your gauges as well as the vent outlet temperature. It can be done with the right person. Sadly not many like that left anymore!
Aug-05-2021 05:01 PM
buystockinfun wrote:
Are those some kind of special inserts or are they like just something you buy for a tire? In other words did you buy them from an air conditioning place or can just pull one off the shelf of Walmart for example? Thanks
Aug-05-2021 03:36 PM