RhoanW 0 Report post Posted December 14, 2012 I found this when searching... For those of you who's with the E36ers and would like to know the what the HVAC codes are, check this out: HVAC Hidden Test Functions (Climate Control) - E36 -------------------------------------------------------------------------------- The HVAC (Heating, Ventilation, Air Conditioning System) of the 1996 E36 has a feature allowing different sensor values to be displayed on the control panel. To Access the Display Function: Press the "AUTO" and "REAR DEFROST" buttons simultaneously. 12 displays are available. Toggle through them by pressing the fan rocker (+ or -) switch. Number Test Function 1 Interior Temp Sensor 2 Exterior Temp Sensor 3 Left Heater Core Sensor 4 Right Heater Core Sensor 5 Evaporator Temp Sensor 6 Engine Speed Input 7 Road Speed Input 8 "Y" Factor Value 9 Fresh Air Flap Position (%) 10 AUC Sensor Voltage 11 Battery Voltage 12 Software Version To Exit the Display Function: Press the "RECIRC" and "AUTO" buttons simultaneously, or Turn off the Ignition. Note: 1. Decimal Points are not shown, Hence 75.5% is displayed as 755. 2. All Temperature displays are in ?C (Centigrade). 3. Negative values are indicated with minus sign Does this apply to the E39's as well? I am having problems with my HVAC. I don't get cold air, warm air or hot air. It was raining lastnight and I couldn't get windscreen de-misted. Any help will be GREATLY appreciated. Quote Share this post Link to post Share on other sites