Michael Pardee says...
> In the R-12 days you could do almost everything
> yourself, but R-134a is a very diffferent beast. I don't
> know why, but I had no trouble recharging R-12 systems
> and failed miserably the time I tried to recharge an
> R-134a system.
I have a 94 Accord, which I think was the first year of
134a. It isn't so cool now, and cycles frequently. I was
planning to get a can of 134a at Wal-Mart, and the
connector/hose, and just charge that into the low side like
I used to do with R12 systems. Are you saying that doesn't
work? If so, I sure would like to find out why.
> Worse, regulations have made the overhead very high for
> professionals. That means you can expect to part with
> most of $100 US for a check-up, which involves emptying
> the system by filtering and capturing the refrigerant
> then refilling with the measured amount of R-134a.
If you're saying they have to evacuate all the old
refrigerant, and add back the correct amount, rather than
just adding more in the first place, I wonder if this is
"regulations" or just the standard repair scam bullshit.
I sure would like to get an explanation, in scientific
terms, of why you can't just add a little 134a. Do pressure
gauges not work with 134a? Do they not tell you whether the
charge is correct?