Whenever any part of WKPT-TV's private microwave relay system malfunctioned, as it did periodically because of heavy snowfall or downed trees, station engineers were forced to broadcast the signal of either WTVK or WLOS whenever network programming was airing. Occasionally, WKPT accidentally aired the local commercials and the station identifications of either WTVK or WLOS being unable to cover them up quickly. When WTVK swapped affiliations with WATE-TV, WKPT merely moved its Knoxville microwave relay west to WATE's transmitter site, also on Sharp's Ridge, and continued to receive ABC via its privately owned microwave relay system. Ironically, the AT&T network signals for WJHL and WCYB were both delivered from Greenville, South Carolina to the phone company microwave that is also atop Camp Creek Bald that fed the Knoxville television stations.