However, the license was recovered years later by WISR's AM crosstown competitor, WBUT, returning to the air in 1959.

The station operated as WBUT-FM for many years until the late 1970s, when the call letters were changed to WLER-FM, and the station began to originate more of its own separate programming, though much of it was done through voice-tracked automation on a 10-inch reel tape-based automation system constructed by owners Bob and Ron Brandon.

The presentation of the voice-tracked announcers led many to believe that Steve Tyler, Dave Ware, and Terry Nelson were all on-site.

WLER saw its biggest change in the spring of 2006, when the WBUT simulcast ended and the station began to take on a more Adult CHR (Top 40)-oriented approach.

Where its two AM affiliate stations tend to serve Butler County, WLER gravitates more towards the suburbs north of Pittsburgh, as well as surrounding communities such as Grove City, Franklin, Mercer, Kittanning, and New Kensington.

The stunting then began with "All Radio is dead" and a montage of All Hitz 97.7 promos and music was played.