A/C doesn't work properly.
 

I'm having a problem with my A/C in my 2007 Mustang. Whenever I put the A/C on, it won't go past one speed no matter if I have it on number 1 or 4. When I put it on, I hear a ticking from the engine bay and the A/C Compressor seems to spin and than stop, than start again. I'm assuming this isn't how it's supposed to be but I never paid really close attention to it before so I don't know. Any tips? Stealership time? What should I tell them? I don't want them telling me the problem is my SHR A/C knobs haha.

You're saying the fan speed doesn't change? What about with the A/C off - does the fan speed change then? If not, go to the dealership. Make sure the knobs are on there right...

Dustin

try replaceing the blower motor resistor i had a problem that no matter what it was it didn't change no matter what setting it was on. it is plugged in behind the gove box. got the new part at the dealer for 11 dollars and it fixed it right away

Take it in. I had my compressor changed out twice. It has some sort of a cluth problem.

Maybe its the cluth.
Maybe its the pressure swith.
Could be the blower rethistor.
What DTC(s) is it thowing if any?