AC will not recharge after system was evacuated. How do I kick on the compressor?
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Joined: Jun 2022
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2011 E350 Blutec
AC will not recharge after system was evacuated. How do I kick on the compressor?
So accidently overfilled the system. AC cut off not won’t turn back on. I don’t have a scan tool and tried disconnecting the batteries. No luck. I tried putting the car in diagnostic mode and same no luck. I have heard of putting the key in on position and holding the gas down for 5 sec then shut off the car while holding the pas pedal. Will this work? Will this erase AC trouble codes?
Out Of Control!!
Joined: Apr 2019
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
hot summer
Why do you say circuit won't recharge after evacuation, no clutch/spinning? Bad sensor ?
Gather your tools for this job:
Avoid messing with pedal reset and A/C overfills. You'd rather be underfilled than overfilled. Here less is better for easier compression under high heat/pressure. I pretty sure you're not going to weigh your gas load
> Scanner reading:
The A/C favorite is the pressure limits sensor getting bad... I guess they use the sensor contacts to cycle compressor clutch directly instead of a SAM relay ..? Replace or bypass it for your system testing.
Compressor will spin once given all it needs unless AAC Module worked out couple codes.
🤞
Gather your tools for this job:
- A/C gauge set with low/high side
- OBDII scanner with data mode
Avoid messing with pedal reset and A/C overfills. You'd rather be underfilled than overfilled. Here less is better for easier compression under high heat/pressure. I pretty sure you're not going to weigh your gas load
> Scanner reading:
The A/C favorite is the pressure limits sensor getting bad... I guess they use the sensor contacts to cycle compressor clutch directly instead of a SAM relay ..? Replace or bypass it for your system testing.
Compressor will spin once given all it needs unless AAC Module worked out couple codes.
🤞
Last edited by CaliBenzDriver; Jul 17, 2022 at 04:52 AM.
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