Heat exchangers are devices used to transfer heat from one fluid to another. In this paper we investigate the application of three different terminal sliding mode (TSM) controllers to a plate heat exchanger. The main objective of the designed controllers is to adjust the outlet cold water temperature to a desired set point temperature. First, a fast TSM controller is designed. To reduce chattering in the control signal, a second-order fast TSM controller is designed. In addition, a dynamic fast TSM controller is designed to further reduce the chattering. The performances of the closed loop system are simulated using MATLAB. The simulation results clearly show that the proposed three control schemes work very well. Moreover, the proposed control schemes are implemented using an experimental setup. The implementation results indicate that the proposed controllers work very well.