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W222 KLA problem
#1
Mercedes Benz 
Hello guys !
I have problem with air condition in MB W222. At morning all working fine, but after some time air condition don't freezing. No have any errors in ECU. System is full. I tried change compressor and valve in system, update ECUs soft, but problem is present . Any ideas?!...
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#2
Hi,
Check the actual value for AC.
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#3
All actual values in AC ECU is OK ! I check it first !
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#4
Mercedes Benz 
(05-18-2018, 01:29 AM)alex1972 Wrote: All actual values in AC ECU is OK ! I check it first !

Dear Sir:
as you described information, i suggest to check the actual value of evaporator temp. sensor. As A/C system run a period, the system doesn't make cooling air anymore. possible causes are:
1. the temperature sensor detect actual temp not correct (a little higher with actual data) you can change it to make a experimental test. or you can adjust the lowest temp higher to 2 celsius degree in A/C module.
2. inspect A/C hose to locate whether anywhere frost
if i help you, please press"reputation"
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#5
All sensor is in correct values .. A/C hoses are not frosting, hoses are warm ..
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#6
does it happens only in auto mode?
if you choose max cooling the same?
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#7
Yes, in auto mode and in max cooling all the same ..
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#8
what are sensor temperatures
if my post was helpful - hit thanks 1087
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#9
Actual values all sensors is ok! About 18-22 °C , refrigerant pressure about 8-9 bar, but low pressure about 6 bar! About 900 mA is compressor current ..
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