Johngoped

my 1998 c43 amg heater doesnt blow hot air any ideas help would be nice

503C43 ////AMG

We would need more details if you want help.

Does it blow air at all? Can you hear anything like the blower motor running? please describe the problem in detail.

DRBC43AMG

Duo valve is probably stuck.

503C43 ////AMG

The DTC on the climate control can help pin point the problem, check out this thread:

http://www.club202.com/forums/showth...gineering-Code

Johngoped

yea the ac works fine but when i turn the heater up all the way it doesnt blow hot air and thanks for the help

503C43 ////AMG

The DTC will also show you codes relevant to your heater system:

01 In-car temperature sensor.
02 Outside temperature sensor.
03 Heater core temp, left.
04 Heater core temp, right.
05 Evaporator temperature sensor.
06 Engine coolant temperature.
07 Regrigerant pressure in bar (e.g. '4' is 4 bar).
08 Refrigerant temperature.
09 Not used.
10 Heater blower control voltage (normal 08-6.0, meaning .8 to 6 volts).
11 Emissions sensor voltage (to detect atmospheric gases and recirculate interior air).
12 Sun sensor voltage (to shift airflow in car).
20 Control current for auxilliary fan (electric fan on radiator, given in milliamps or mA).
21 Engine speed (x100).
22 Road speed (km/h or mph depending on installation).
23 Battery voltage at terminal 58d (as a percentage of total voltage, e.g. 99.0 = 99%).
24 Battery voltage (e.g. 12.8 = 12.8V).
40 Climate control software version.
41 Climate control hardware version.

dls55amg

hello to all98c43amg,no airflow from center vents,seems to be stuck on side vents& defrosters,tried the auto mode & manually,cant wait to get all these issues resolved & enjoy driving the amg