what is the verdict on servicing yourself vs taking it to an AC shop? Done most of the standard MUD mods and repairs - except head gasket
not sure where this ranks for someone who has never tackled it....
OK, apparently swimming upstream here, but...
Losing charge every three years is a pretty darn slow leak, similar to an engine oil "weep" that leaves no noticeable drops/puddles under the vehicle.
Buy a can of r134 for ~$10 and charge it up (read up here how to do so safely and effectively) and you'll likely be good for another three years.
Curtis