A/C compressor only engages in the Morning

Tiny
CARLTON1
  • MEMBER
  • 2013 MERCEDES BENZ C350
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
The compressor will engage in the morning and A/C will work perfectly. After the car is turned off the A/C compressor will not engage again.
Tuesday, April 5th, 2022 AT 4:10 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,406 POSTS
I have seen the front sam control module heat up and go out causing this issue but to be sure let's do a CAN scan which goes through the entire car and shows any faults with the HVAC system. The scan is easy to do check out this guide and video. Also, I have included the A/C wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Wednesday, April 6th, 2022 AT 11:05 AM

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