Dear All,

I was out of town for two months. When I got back and started my 2000 C280 (with climate control) to find that the A/C was not blowing cold at all (air is blowing but it is not cold). Anyway, I checked and the compressor is running. I could find the low port easily but could not locate the high port (later on I figured that there may not bee a high-port)

I found a lot of info for E-class climate control, but almost nothing for the C-class. I guess most of the sensors are the same (even though the procedure of getting to the sensor readings is), but how about entering the fault code mode? The climate control unit in my c-class does not have the buttons that the E-class unit is using for entering these modes.

Has anyone come across information specific to the C-class climate control?
Would the fact that there is a built-in pressure sensor for the high side explain why there is no physical connector on the high-side?

When I get the system into the "Collect Sensor Data mode", I get:
1- 88F
2- 84F
3- 87F
5- 89F
6- 196
7- 8'4
8- 98F
9- 33F
10- 125

Unfortunately I do not know how to get it into "Trouble Code" mode. I am also not sure what "9" is above and what unit "7" is in (when it is displayed there is a small circle on the top between 8 and 4. It changes with the engine RPM from about 7'8 to 11'0 (at 4000rpm)).

Any ideas?

 

I am still not sure what those readings mean...

Thanks!

 

try checking the refrigerant pressure for the a/c system...
check if there's enough refrigerant left in the system..there might be refrigerant lost after leaving the car for quite some time...