My '91 GL's A/C is not doing a great job since converting from R-12.
Because there is little information in Bentley, perhaps some of the
great people on the list can add a bit of data.

I have a thermometer in the ducting just in front of the driver to
monitor the output air temperature. When running with all the outside
vents closed, the A/C full cold and fan speed at 3, I can get about a
25F drop from the outside air. This means that at 85F outside I am
getting 60F air in my face. I would like to have another 10F to be
completely comfortable.

It seems the R-12 did a better job but, lacking data, I can not be certain.

BTW, what is ES-12? Has anyone used R-406a in a GL?

Thanks,

Herb Harmison
2692 Meadow Glen Road
Ames, IA 50014
515-292-7059 Phone/Fax
herbh@iastate.edu