The dire ramifications of under- and overcharging an air conditioner or heat pump were covered last month ("Using the Superheat Method to Charge A/C Systems," The News, Aug. 13, page 1). The first ...

Charging air conditioning systems is much different than charging refrigeration systems. Many charging curves and tables are used in the air conditioning field. Manufacturers may vary in the style of ...

AC/DC fills four spots on the Official Rock & Metal Singles chart, and all of the band's current hits are on the rise—a rarity on the tally.

AC/DC's "Shot in the Dark" surges onto rock radio, debuting at No. 5 on Billboard's Mainstream Rock Songs airplay chart dated Oct. 17.

AC/DC jumps from No. 62 to No. 1 on the Billboard Artist 100 chart (dated Nov. 28) to become the top musical act in the U.S. for the first time since the chart's 2014 launch.

AC/DC earns another worldwide hit this week as “You Shook Me All Night Long” debuts on the Billboard Global 200 chart.

AC/DC and Chris Stapleton debuted in the Nos. 1-2 spots on the album chart. Billie Eilish's "Therefore I Am" bowed as the top song.