We often receive calls from folks who are having a problem and want help in understanding what the problem is and how it can be corrected. This time of year it is often calls about air conditioning. The call goes something like this: “my AC is not blowing as cold as usual and I wonder how much it will cost to get the system recharged.” Now AC is not that simple of a system and when it does not blow cold it can be caused by a leak allowing the freon to escape from the system. Or, it could be caused by an electrical problem that results in the system not turning on properly. Or, it can be a mechanical problem such as a compressor failure that results in no cooling. Or, it can be …..