No power to the A/C compressor

Tiny
PUPAIGE
  • MEMBER
  • 2014 MERCEDES BENZ GLK 350
  • AUTOMATIC
  • 127,000 MILES
I have the vehicle listed above glk350 and at first my Nothing works inside the car except for the windows power button and mirror adjuster. Button would blink three times and warm air would come out. Took it to firestone, they said the compressor is not getting power, but it works. Now that the A/C button is continuously blinking, the auto button is on, none of the other button's work, and warm air is blowing (it will not turn off) I've changed every A/C related fuse and checked the relays.
Saturday, June 18th, 2022 AT 11:45 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Hi,

Here is what we need to do. If I was to try and direct you, it would be a guess and this isn't an inexpensive vehicle to throw parts at, so you really need to have the can-bus needs scanned.

CAN stands for controller area network. Basically, all the different computers/modules are tied together via a few wires. They use these few wires to communicate back and forth.

If you have the can-bus scanned, it will identify diagnostic trouble codes regardless of the module storing them. This will point us in the right direction for diagnostics and repair.

Here is a link that shows how it's done:

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

It really isn't difficult to do, but it does require a scan tool with the capabilities.

If possible, have this done, and let me know what codes are retrieved. That way I'll know how best to help you.

Let me know what you find.

Take care,

Joe
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Sunday, June 19th, 2022 AT 8:55 PM

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