The station applied for its construction permit on September 22, 1995 under the temporary call letters 950809KF. The Federal Communications Commission (FCC) approved it on October 4, 2004. It was originally planning on using UHF analog channel 61 (from which the Channel 61 Associates, LLC name for the station's licensee is derived) but switched to channel 40 because channels 51-69 would no longer be used for television after the DTV transition. In 2006, the station decided on the call letters WCWF sparking speculation that the station would be an affiliate of The CW. However, that affiliation went to Fox affiliate WFFF-TV, first as a replacement for its secondary WB affiliation and then on a new digital subchannel (The CW affiliation has since moved to a subchannel of NBC affiliate WPTZ).
While it searched for its own affiliation, WCWF finally began broadcasting September 11, 2007 as a repeater of Ion Television affiliate WWBI-LP, the owners of which held a stake in the station. After a short time on-the-air, the station signed-off telling the FCC it was preparing to switch to digital. In November 2008, Channel 61 Associates sold the station to Twin Valley Television, a broadcaster based in Burlington which also goes by Convergence Entertainment & Communications or CEC. Twin Valley took control of the station while the sale was still pending FCC approval. As of 2011, however, the application for transfer of ownership no longer appears on the FCC website.
At the end of 2008, it signed back on from a temporary low power analog transmitter which was meant to last until its permanent digital transmitter was ready on June 12, 2009. However, there were delays in getting its new transmitter installed so the station switched its temporary transmitter to digital for the time being. In early-2009, the station became an affiliate of the Retro Television Network. On June 16, WCWF changed its call letters to the current WNMN.
Meanwhile, Twin Valley also purchased WGMU-CA (formerly Vermont's MyNetworkTV affiliate once owned by Equity Media Holdings) which was approved by the FCC in July 2009. That station along with its translators were turned into repeaters of WNMN which greatly expanded its coverage area into the greater Burlington and Plattsburgh areas. The owner announced that WNMN would air a mix of RTV and local programming on its main channel, while also carrying five digital subchannels, one of which airs MyNetworkTV (WGMU's former affiliation). MyNetworkTV affiliate WNMN-DT3 also began offering Tuff TV on July 15, 2010. The subchannel was to be carried on Comcast channel 18, but as of 2013 is still not available.