Originally Posted by kitchenrat

slightly higher 134a pressure means the system is overcharged. this has got to be the number one mistake by diy's and pro's alike. 134a suffers from a bad reputation because most people who use it don't know what the hell they're doing. if you don't believe me read almost any ac thread or post on this site. very few of them are helpful and most are full of overblown opinions of people who are either inexperienced or just ignorant. i've worked on auto ac systems for 25 years and made the switch to 134a with no problems that weren't inherent to older systems as well. whoever charged you 2200 dollars to work on your system and now wants 800 bucks to replace a hose is a very talented individual, but his talent obviously has nothing to do with ac repair.