BMW Faxed the the following...
CUSTOMER FEELS HOT AIR ON ONE SIDE AND COLD AIR ON OTHER
BOTH SIDES SET ON SAME TEMP. FULL AUTO.
HEATER HOSES HAD BEEN CHANGED ELSEWHERE AND WERE REVERSED AT THE FIREWALL.
(WATER VALVE CONTROL WAS REVERSED AND UNABLE TO
RESPOND CORRECTLY TO HEATER SENSOR INPUTS)
CHECK IHKA OPERATION. CHECK FAULTS. NONE STORED.
CORRECT HEATER HOSE POSITION AT FIREWALL.
TOTAL INVOICE 0.00
I'm just glad that they've fixed it....now that its 75* outside....