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[xj-s] refrigerant question
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[xj-s] refrigerant question



I filled my A/C with this stuff called "Autofrost", made by Monroe Air Tech
Inc. in Bloomington, Indiana.
It says that it's a replacement for R-12 and R-500, and warns that it
should not be used in a system that has had R-134A "unless you can remove
all the oil and replace with regular mineral oil of alkyl benzene". It also
says that it should be charged to 80% (by weight) of the normal charge of
R-12. I suspect that this is a similar substance to "hot-shot" which has
been discussed on the list several times before, but I'm wondering if
anyone knows what it actually is, i.e. does it have a number like
R-something. It says that it contains Chlorodiflouromethane and
Chlorodiflouroethane.

The guy that did this for me thinks that my compressor might be weak,
because when the gauge for the high side is very jumpy at times, (rapidly
fluttering across a 20 or 30 pound range) and the sight glass still shows
froth even though we increased the pressure today from about 175 to about
225. I thought that would make it blow colder, but it doesn't feel like it
made a difference. It's working, don't get me wrong, but it's not the kind
of cold I'd like it to be; my girlfriend's Toyota Camry is so cold it
actually hurts to hold your hand next to the vent for a minute or two. What
temperature should the air be coming out of the vents?Do I need to dangle a
thermometer down into the vent to get an accurate reading?

                                                        jb


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