A/C? where for art thou?

[Joshua Van Tol]

>  > yes, there is a switch in the system that prevents the comressor clutch
>>  from engaging
>>  when the system is too low on coolant ... simplest test is to find the
>>  fill or purge valve and
>>  quickly depress it ... if there is a loud, powerfull hiss, chances are
>>  there is some freon still
>>  left in your system however; if there is a fizzle ... you need new
>>  freon. at about $60 to $80
>>  per lb of the old R12, it will probably cost anywhere from $150 to $200
>>  to get it serviced...
>>  barring any leaks in the system.
>
>And if your freon is low, it is absolutely a fact that there is a leak.
>Think about it.  And the leak *must* be fixed before it is recharged (by
>any reputable shop where the owner wants to "stay free").  And that
>might be expensive and can't be done for fun at home.  And that is why
>(among other reaosns) my 90Q has no AC, just like my coupe...

Actually, you can do your own AC service. You'll need a gauge set 
($150), vacuum pump ($250), and a leak detector ($200). Pays for 
itself after only a few repairs usually. I've gotten by with a gauge 
set, and a vacuum pump, but I'll be buying a leak detector sooner or 
later. Just be sure to get a good book on AC service from the 
library, and study up on the theory and practices of ac before you 
dive in. Things like too much refrigerant, too little, too much, or 
the wrong type of oil can cause big problems.

BTW, in most places it is not a legal requirement to fix leaks. After 
all, all automotive ac systems leak to some degree. Usually on the 
order of an ounce or two a year through the fittings, hoses, and 
compressor seal. But anything detectable with a leak detector needs 
fixing or it'll be a problem.

BTW, if anyone decides to go out and buy a leak detector, I'd be more 
than happy to explain its proper use, as it's not as simple as it 
seems.
-- 
Joshua Van Tol -- josh at spiny.com