it's just the gas, there's nothing you could really do to check it...
it's cheap to refill, i got my E34 done with SP34E for $80AU (about
$55US) and he came out to my office and did it
now it's so cold the little temp stick that he put in the vent went down
to 0C ! now that's cold!
if you use your aircon often you will probably need to regass every 2 years
Quite the contrary. Lack of use is the culprit. The seals dry out, develop
leaks and then the refrigerant leaves when pressurized. Good practice,
cycle the A/C on every week or so even in winter .. just a few seconds to
pressurize the system and circulate the refrigerant.
R / John
Usually, you can have someone turn on the a/c while you watch the little
window in the fitting next to the dryer (a round pint-sized canister).
If too many bubbles appear, or if it takes a while for the fluid to run by,
That is bullocks. My '91 E34 (with R12) has the original charge. If you
have had to have it refilled every two years, you should get the seals
or whatever is leaking replaced.
My 95 e34 has the original charge as well. It did stop cooling
sufficiently, though. It was a filter. If you haven't cleaned the filter
under (behind) your dash every 25-30k miles, debris will build up
and limit airflow through the dash vents
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