The station was born October 2, 1947 as WKBR-FM. Throughout the 1960s, and very early 1970s, WKBR-FM simulcasted the Top 40 format of WKBR-AM 1250, providing that station with significant extended coverage. In July 1971, WKBR-FM became WZID, and the format was flipped to Beautiful music. In the 1980s, instrumental easy listening music was scaled back, with soft vocal hits added, to the point where the station evolved into an Adult Contemporary station. In October 1990, Sunshine Broadcasting of New Hampshire Inc. announced the sale of WZID and 1370 WFEA (AM) to Saga Communications Inc. of Grosse Pointe Farms, Michigan. The sale was finalized April 16, 1991. Saga Communications of New England LLC operates the station today. WZID's President and General Manager is Raymond Garon.
WZID used to be heard on translator station, W270AH 101.9 in Peterborough, New Hampshire. However in 2008, Saga Communications filed a series of minor translator applications which moved the translator into the Keene radio market as W276CB, a translator of Saga radio station WKNE's HD Channel as "Kool 103.1".
Up until mid-January 2009, WZID had two more translators, W231BR 94.1 in Manchester at 250 watts and W276BJ 103.1 in Concord, also at 250 watts, but in January 2009 those two translators were turned into the new "Hot Hits 94.1 and 103.1", a simulcast of WZID's HD-2 channel, which is a top 40 station broadcasting Dial Global's Hits Now! format; branding themselves as the new hit music station in New Hampshire. Saga Communications obviously had been planning this out for some time because both the translator's power was recently increased from low power to 250 watts. This station somewhat poses as a threat to WJYY and even WFTN-FM, but has an inferior signal compared to the two. Saga was able to open up this new station due to a loophole in the Federal Communications Commission (FCC) rules that allows HD sub-channel stations to be repeated on translators. Recently, Hot Hits increased its power on 94.1 to give coverage improvements to the Keene, Portsmouth and Lowell areas. On December 11, 2013, WZID-FM was granted permission to implement its 94.1 W231BR-FM translator's HAAT increase up to 18 meters (59 feet) (although the ERP of would remain at 250 Watts), to improve 94.1 W231BR-FM's coverage of surrounding communities (such as Keene, Portsmouth and Lowell).