TomE430

I have a 2000 year model E430 (w210) that I've had for years now (8 years?). The AC blower motor died a couple of weeks ago, so I got a new blower motor with resistor (this is not the first time I've done this repair/replacement since owning this car) and replaced the blower assembly. After which the AC blows again with great strong air flow. However the air temp coming out is no where near as cold as before. So I'm lost why the AC is not blowing as cold as before (temperature wise). I've tried the resistor that came with blower assembly and the old (previous) resistor. No change in air flow speed or AC cold air temp.

I thought perhaps the hvac system needed freon (r134a) so I looked up how to get the freon pressure using the hvac diagnostic mode, and section 7 (I think it was) had a value of 17 which from what I understand isn't low. (so the system doesn't seem to need additional r134a freon)

Is there anything I can check before taking it to a pro? Is there a sensor calibration? Or a reset or something?

Also to be clear, the AC is absolutely cooling the air, just not like before the new blower was installed. It's like (for example) the cold air was being cooled to 50*f before, and now it's only being cooled to 70*f...so still cold but not as cold.

ANY advice would very much appreciated.

kajtek1

http://www.mercedesmedic.com/ac-air-...le-codes-list/

Plutoe

17 for a pressure is great. The fault is elsewhere and most probably at the expansion valve and or the evaporator. Complete the actual value test and look at that data before the AC guy gets his hands on your system. You may say what am I looking for---well when you are at the doctors and he tells you your blood pressure is very high--do you tell him the solution or wait for his professional advice--think on that for a moment.......and watch out for misinformation!!

TomE430

I'm unable to get in to that menu? If I hold REST I get in the menu that shows the values (which is where I got the 17 value on section #7)

I'm obviously not holding the correct 2 buttons? Which ones should I be pressing?

TomE430

Can you tell me how to run those checks?

kajtek1

Read the notes at bottom of the help page.
It is all there.
Post the sensor values here if you don't know how to interpret them.

TomE430

B1416 is the error code. Not 100% sure what that code is?

If anyone reading this is the future. The way i got the diag (dtc) codes was put the drivers side on HI and the passenger side LO and press EC and REST while the key is in the on (not started) position. Cycle thru them using the passenger side auto button.

kajtek1

You keep asking questions that are well answered on linked page.

TomE430

Is that Repair something easily done or is it best to seek out a pro repair place?