The original construction permit for the station was issued to KLMR, Inc. on August 4, 1976, and issued the KLMR-FM call sign on October 26, 1976.[3] The station signed on in November 1978[4] and was licensed on March 12, 1979.[3] On October 25, 1982, the station changed its call sign to KSEC, on November 17, 1999, to KSNZ, and on May 26, 2004, back to KLMR-FM.[5]
On June 11, 2018, KLMR-FM changed its format from classic rock to hot adult contemporary, branded as "93.5 The Heat".[6]
The station's studios, co-located with the transmitter for its AM sister station, were destroyed in a microburst on July 23, 2022.[7] While KLMR-FM would resume operations from makeshift facilities in the conference room of KVAY, described by the stations' chief engineer Kit Haskins as an "engineering nightmare",[8] 25/7 Media subsequently elected to shut the station down on September 20, 2022, and surrender the KLMR-FM and KLMR licenses; the closure left KVAY, whose owner Bob DeLancey had a 33 percent interest in 25/7 Media, as the only commercial FM station in Lamar.[7] That October, the KLMR licenses were reinstated, with 25/7 Media instead requesting special temporary authority to keep the two stations silent for financial reasons.[9] On January 2, 2023, it was announced that Riverside Communications, LLC had purchased KLMR 920 and KLMR-FM from 25/7 Media for $30,000; the purchase was consummated on March 1. Riverside planned to rebuild and return the stations to operational status, with a tentative launch date of early 2023.[10] Testing and tuning of the KLMR-FM signal began on May 8, 2023, with the official relaunch with a classic hits format scheduled for May 15, 2023.[11]
