M-Class (W166) Produced 2012-2015

13 GL450 Ac code 91EB15

Old Jul 22, 2023 | 07:43 PM
  #1  
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GL 450
13 GL450 Ac code 91EB15

Ac compressor replaced, drier, condenser, new, Ac compressor is not turning on, vacuum out and added Freon, system will not take more, Ac compressor not kicking on, scanned code came on as 91EB15 actuation of the refrigerant compressor has a malfunction, there’s a short circuit to positive or an open circuit, along with 919100,low refrigerant level A10D00, the power supply is low

all codes erase except for 91EB15 Come on,
and ac light blinks when pushing ac button on.

any help and suggestions would be greatly appreciated.

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Old Jul 23, 2023 | 09:37 PM
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Which compressor did you get as a replacement?

the electronic control valve is shorted, or it is the wrong valve? Need the compressor model to check
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Old Aug 30, 2023 | 10:56 PM
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Blockage?

Sounds like you either have a blockage in the new condenser or the expansion valve is no good. Check temperatures across each component to see where the hot spot is. The temps across the condensor should not be much. I would bet it's the expansion valve not opening up enough. I don't remember what the temperature across that valve should but it should be significant.
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Old Aug 30, 2023 | 11:11 PM
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Please post a photo of the front of the compressor

The error code is electric, nothing about AC refrigerant flow.

Very common getting a new wrong compressor. If the compressor is not original, and the parts is missing the diode, it will NEVER work until hacked, or use the correct compressor. Post pictures of original and new compressor, and I can tell you. Please include electronic valve too in the photo

Last edited by JCM_MB; Aug 30, 2023 at 11:15 PM.
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Old Jul 20, 2024 | 10:55 PM
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ML350 BlueTec
Hi Benz1978,
can you tell me how this was corrected?
I am experiencing the exact same issues.

Thanks

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Old Jul 20, 2024 | 11:11 PM
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ML350 BlueTec
Juanmor40,
What's the hack ? Do you know where the diode would be installed and the value? I did received a new clutchless comp and had concerns about the controller having an Canbus issue.
Original unit was the clutch type, currently I have the clutch signal wire open- I thought of putting 5-7 ohm resistor in place to simulate the coil.
Any help truly appreciated!
thank you
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Old Jul 25, 2024 | 11:25 AM
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Originally Posted by Aviate1
Juanmor40,
What's the hack ? Do you know where the diode would be installed and the value? I did received a new clutchless comp and had concerns about the controller having an Canbus issue.
Original unit was the clutch type, currently I have the clutch signal wire open- I thought of putting 5-7 ohm resistor in place to simulate the coil.
Any help truly appreciated!
thank you
If you have not solved your problem yet, please post snapshots of the compressor labels for both compressors: old and new, and I can take a look.
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Old Jul 25, 2024 | 11:54 AM
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Originally Posted by juanmor40
If you have not solved your problem yet, please post snapshots of the compressor labels for both compressors: old and new, and I can take a look.
Mine was a bad clutch. Replaced the unit and it works great now!
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