A/C not working on a w140 1992
 

Hello every one; I have a 1992 300SE W-140 THE a/c will work some time, just on and off, i just put a new belt and tensioner when i start the car after that the a/c come on ice cold then i turn the car off started again clutch will not engage, when i started again the clutch engage ice cold a/c i have been trying to find the problem for a month nothing. the system is fully charge. please help! I been and a journey trying to find the problem any suggestion will help.

Sounds like electrical/push button unit issue to me. How good are you at troubleshooting electrical issues?

not very good , but i was thinking about that today, what do you have?
Thanks for answering.

How do i check that push button unit is working or not?