My 2012 Mazda 2 has an annoying hissing sound coming from the air-conditioning. It is audible through the air vents, it's louder on a hot day, and comes on every 20 seconds and runs for six seconds.

The air conditioning season seems to always be in full swing somewhere in the U.S. All air conditioning systems should be given a preventive maintenance tune-up before starting for the season. One ...

Last week, I waxed rhapsodic about why we wrench (the joy of solving problems, making choices, doing things our own way, controlling our world), and mentioned a few wiring-related things as examples.