A/C compressor only engages in the morning

2013 MERCEDES BENZ C350

100,000 MILES • 3.5L • 6 CYL • 2WD • AUTOMATIC

CARLTON1

MEMBER
1 POST

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.

Apr 5, 2022 at 4:10 PM

STRAILER

✓ASE Certified Mechanic
54,832 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.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Apr 6, 2022 at 11:05 AM