A/C 89 735il blowing like heater
I have a 1989 BMW 735IL. I just got the a/c running again, but when the engine gets hot, it blows cold and hot like the heater is going at the same time the a/c is going. It is especially noticable when the button that sends air to all zones is engaged. In the winter, the heater seems to work perfectly. I disconnected the wires at the heater valves, but that did not make a difference.