Although the idea of using the two-ion hybrid resonance to heat the minority species has been around for a long time and been in use in many experiments, the effects of the changing temperature of the minority species on the mode conversion process has not been carefully examined. In this paper it is shown that the behavior of the mode converted ion Bernstein wave not only changes quantitatively as the minority temperature changes, but changes qualitatively, so that the ion Bernstein wave switches sides and changes from a backward wave to a forward wave (or vice versa). While the absorption may not change dramatically, any potential use of the mode converted wave for current drive may change dramatically as the location of the driven current changes as the minority–majority temperature ratio changes.