I would suspect the blower control module failure was what caused the fault to begin with. After you replaced the module, the fault needs to be cleared with a Tech II, or you can wait until the system has gone through about 50 ignition cycles and it should reset itself if no recent faults are found. Most of the time, when you remove the battery cable with the A/C controller ON, it will set a fault/flashing display. I would wait to see if it will reset on it's own! BTW, the pic below shows the electrical actuator on top of the heater box, that controls the blend door for the heater core. If you look at this actuator when you first turn the system ON, it should move the full stroke one direction and back to a predetermined setting based on temp control setting.
