I have a manifold set and 30lb can of R-22 refrigerant and need to top
off my home AC system that seems to need a recharge every 3-4 years.
Is there a do-it-yourself guide that shows how to locate the low
pressure recharge point and steps a repair person through it? I've
googled the subject and not found anything! I really do not want to
pay a repair man $100 to add one pound of refrigerant into the system,
when I own the coolant and tools. Thanks in advance.