Its getting hot here again in Florida and A.C. is blowing hot.
I pulled the following codes but am unable to determine what they mean any one can advise what they mean.
1-32
2-20
3-38
4-31
5-35
6-105
7-08
8-38
The other codes are : E61 522
E61 510
E Fr
Thanks Rod

With ignition in on position, turn climate controls on, then press and hold REST for 5 or so seconds, or until you see an 01 flash then another number will flash (inside temp), then back to one, use the arrow up (defrost) and arrow down (feet) to scroll up and down through the codes.

1. In-car termperature sensor (with aspirator blower)
2. Outside temperature sensor
3. Heater core temperature sensor
5. Evaporator temperature sensor
6. ECT sensor (Coolant temp.), e.g. 12*5 = 125C
7. Refrigerant pressure in bar, e.g. 12*8 = 12.8 bar
8. Blower control voltage, e.g. 16*5 = 1.65 volts
9. Software status of A/C pushbutton control module
15. Selected in-car temperature
20. Version code
21. Engine Speed (RPM), e.g. 6*0 = 600 rpm
22. Terminal 58d (Bat. Volt.), e.g. 99.0 = 99% of voltage
23. Vehicle speed (Kilometers Per Hour)
50. Not used – 00
51. Number of current slip recognition (poly-V-belt)
52. Number of stored slip recognitions (poly-V-belt)

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96 E300d

Thanks for the reply, I guess my second question should have been does it show anything at fault or not in line with what it should be e.g not enough refrigerant etc.

Thanks Rod

Hope this webpage helps.



Service Articles from Continental Imports

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96 E300d

Pimpernell, thanks again for your response. The page you sent me is one of the ones I have read first, thats how I was able to retrieve the codes using that web site. They however don't tell you what you should be expecting as base numbers... Will hook my walmart bought gauge up to it and see if it says with regards to refrigerant.

Rod

I am getting worried now. I used an interdynamics gauge on the low side and the pressure is 85. Some may say I attached to the high side but the only port available that I can see is right in front of the brake booster fat hose( E300 W210). I have never added R13 to the system since I bought the car in 2009. The ac has always blown cold but, from time to time it has always had a piercing whistle through the vents when the system is running . ANY IDEAS???

Rod

Low side static (generally the same as high side static) and low side compressor engaged are different. 85 is 85-what, psi? If so, that sounds like static pressure. It should drop considerably (I'm guessing to the 30's) with the compressor engaged.

Sixto
87 300D

The interdynamics gauge, 85 is in psi which means it is in the RED portion of the gauge which says too HIGH. Hope that helps.

To get a meaningful pressure check, the compressor must be running. If the compressor isn't running, the pressure on the low side will be the same as the high side. What you want to see is the high side pressure go up and low side drop from static. If the low side goes too low, there isn't enough freon in the system. If the high side goes too high, the expansion valve / orifice tube is clogged or compressor isn't cycling off.

Cant tell if the compressor is cycling off and off as the noise from my diesel is so loud and the compressor is on the bottom of the engine which makes it even harder to tell. I guess checking the pressure on the high side should give me a clearer picture of whats going on.

After reading several posts on HIGH SIDE dangers I decided not to hook to the high side with my PSI gauge that comes with the recharge kit. Did not know if this would be suitable for hooking to the high side with engine off to just check static pressure. I did check static pressure on the low side again and it was 87. Upon starting the engine and turning on AC to its coldest settings the pressure dropped to 72 PSI and stayed there. Can anyone offer any advise??

Rod

IIRC you can't attach a low side gauge to a proper 134a high side fitting.

Is the compressor engaged? If so, it sounds like the compressor is shot. A bad expansion valve should allow a lower low side.

Sixto
87 300D

Cant tell if compressor is engaging or not. 1997 E300D. th compressor is on the bottom front of engine the noise from the diesel is too loud to hear the compressor.. any suggestions.

You can look to see if your compressor is turning or not. You can also turn it by hand with the engine off to make sure its not locked up. Any ac people please take a look at my tread posted today in general forum. AC problems suck.

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2006 E320CDI- current dd
1999 E300TD - retired
Wilmington, NC USA

Ok, I am moving at a snails pace but, presume I am getting somewhere. Using the low pressure gauge static psi at ambient temp is 90. Turning ac on and running car pressure drops to 72. The clutch turns freely by hand when car is off and clutch is turning on and off as the ac switch in the car is turned on and off. The clutch continues to stay engaged if ac is left on but car does not cool down.