A/C blowing warm

2002 MERCEDES BENZ ML500

53,467 MILES • 4.7L • V8 • 4WD • AUTOMATIC

GRIP2002

MEMBER
1 POST

My A/C was working fine, and then one night my dash lights went out. I found out that fuse 44 had blown (it's also connected to the aux recirculating fan, which I found had a leak, I've ordered another one). However the A/C is not blowing cold, and from what I have read, the aux pump, has nothing to do with A/C. Any suggestions?

Aug 22, 2019 at 5:50 PM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,194 POSTS

Welcome to 2CarPros.

Have you checked fuses related to the AC? Have you checked for power at the compressor? I attached a portion of the wiring schematic. I need you to check the fuses I circled, especially fuses 4 and 5. They direct power to the instrument cluster and the module control behind the dash.

Check those and let me know. Also, if you can check for power to the compressor, it would be helpful.

Here are a few links you may find helpful:

https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

_____________________________

Let me know what you find.

Take care,
Joe

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Aug 24, 2019 at 7:30 PM

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