comptronix

At my last visit to MB I had them check my a/c and was told that my compressor was going bad . I told the guy I was going to do it myself and he informed me that once I install the new compressor , I would have to bring it back for them to do some sort or reset . Since I haven't ever had to do that I was wondering if I need have to wait to fill it till MB done the reset.

miatawnt2b

you should reset the climate control module if there are errors present. Do a search for the procedure. simple.

I just had my compressor replaced at an indie since I didn't want to deal with it. However, last week I had teh front bumber off to replace headlight lenses and make a mesh grille. As I was under the car it appears pretty easy access to the compressor from teh bottom. Let us know how it goes.
Remember to replace the filter/drier too.
-J

CJackson13

Just had my compressor replaced at my indie as well. $1100 and it was totally worth it to me... But I'm biased cause I live in phoenix, so I'd rather not replace it myself during any time of the day hahaha

miatawnt2b

Huh... I'm in Tucson. I feel your 112* pain. I'm working on some things to make this thing cool better (been around HVAC systems since I was 4) Since we are so close and I know you have ambients above 102*, can you run the diagnostics for me on your car... I am interested in numbers 1-7 as you are on the freeway rolling at 65-70mph, climate ctrl set to auto.

My car only will pull 57* I think it should do better than this even at 100+ ambient. Almost positive I'm overcharged just slightly now, but I am looking at different refrigerants to give me an extra 7-10* at the evap. You're 1-7 data would really help...
-J

CJackson13

So your issue is that your car is not blowing an air temp below 57*? I'm pretty sure that's the low setting on the car. I know nothing about HVAC so I would have no idea how to bring the temp down or if it's even possible. I'll run the diag sometime this week. For a cooler cabin we should both probably invest in some UV reflective tint

I'll be down in Tucson at the University for the academic year. We could get together and figure this out. Let me know.

miatawnt2b

I appreciate it. Set your climate ctrl to low on both sides, high blower. Then press and hold the rest button for 10 seconds. Then scroll through the numbers with the left auto button. Jot down the numbers between 1-7. Thanks a bunch.
I'm in the NW, but frequently around the UA campus.

CJackson13

Haha I've done diags before so I understand the whole function of the module. I just know nothing about how the compressor functions and vacuums ect... Sounds good, I'll pm you when I'm down there

Clk-Lexy

believe i need to replace mine too, if not the whole system.... need to do it soon as we are a few weeks away from 100+

stim141

In St Louis last summer we had temps in the 105 range - my 2000 CLK430 with original compressor, evaporator would show on 4 around 38-40F with a blower speed of 4 bars. The freon pressure #7 would average about 12-14 at speeds and around 16 with high ambient temps at idle. Also the 4 value or what the temp at the evaporator can go as low as 37 at idle. The higher the cabin fan speed the higher the temps at the evaporator. With your super high ambient temps I would guess the in cabin temp would be about 42-44F IF the charge is perfect and the compressor is running fine. If there is ANY air in the system the temps would be much higher. Your best bet is to have the system evac'd and recharged properly (NOT A DIY because you need a vac pump and proper gauges.) Cost should be less than 105. If you charge it with just a DIY can the air will still be in the system and you can blow the compressor or something else which isn't cheap.