Originally Posted by Anna Sail
The reason you don't find a dearth of info regarding charge information is that it's a controlled substance. Trained techs have the info, plus the techs who think they're trained, unfortunately, and think they can apply what they've learned about refrigeration
expansion valve systems and car air conditioning
systems to a 12v capillary tube system. Three very different beasts!.
To Clarify (and this may only hold true for the USA) but R134a is on the shelf for anyone to purchase
and use in every auto parts
store and in most Home Depots and Walmarts I have been into around the USA.
Being in the industry myself, it is my opinion
that the reason companies decline to share detailed troubleshooting and recharge instructions to their clients isn't because of R134a restrictions, but because:
A) They are protecting their dealer network who make a fine living on charging
calls that if the clients had the proper technical information they could easily do themselves
B) The liability risk in terms of warranty in having someone not trained doing the job incorrectly and thus causing more harm to the system than when they started
C) Frankly it takes a LOT of customer service
time and manpower to walk clients through troubleshooting and fixing refrigeration
problems. I spend hours upon hours of time on the phone
and on internet/email walking clients through the step-by-step details of troubleshooting and fixing things. Right now I'm walking a client in Fiji
through the process of soldering out his failed compressor
and installing a new one. That is taking literally hours of email
time and that honestly is something most companies are just not willing to do in this sell it and forget it world.
Refrigeration isn't rocket science and if someone is good at following directions and not going off on their one guesses or what their dock
neighbors tell them (which is often times contrary to professional advice from the manufacturer) then I can just about walk a client through fixing anything with their system via skype, sat phone
, or smoke signals.