A/C short cycling, high pressure

Thanks for the reply. I'm waiting for the actual values to both questions from the dealer. They keep teling me the pressures are within specs. It seems like every question I ask they want to run it by Ford.

What should the hi/ low pressures be when running and at rest when they hopefully are equalized?

Is there a high pressure switch? Or do they do fancy magic (math) with the computer & the evaporater temp sensor to calculate the high pressure?

I guess I really want to know how the system works, the window/range for each sensor, and what sensors are really used. The folks at the dealer can't answer any detailed question. For example; what is the range for cycling the compressor if it's the evap. Temp sensor? 33F to 38F to cycle on-off?

Hi KHLow2008,

Could you please re-send the description file. My Junk emailbox grabbed it and I accidently deleted it, sorry.

Is this description specific to the 2010 Fusion system?

Thanks in advance for re-sending the file.

Regards,
M49195

Thank you very much. It came through fine and is VERY informative. Is there a schematic of the system available that may also show the locations of the devices?

Also, is there any documentation showing the operating settings/ranges for the temperature sensors and pressure transducers? For example: at what pressure does the high pressure sensor shut off the compressor? At what low temperature does the evaporator temperature sensor turn off the compressor and at what temperature does it allow the compressor to come back on?

Hi I have the same problem, I don't know if it is the high pressure sensor (or switch) that it is turning of my compressor. I checked the low and high pressures and there are fine. So I suspected that the high sensor is asking for turn off my compressor. Can you send me the file with the AC information.
Thanks in advance.