I typically operate our Grand in the manual mode.
Lately, the A/C compressor has been engaging without selecting the auto mode or pressing the A/C button. We are bringing in outside air so the recirc. setting isn't the issue. I have noticed this for the past few weeks when the OAT exceeds 50 F.
I've noticed in my 2012 the AC light comes on in manual mode. Never seen it in auto. I called Jeep engineering and there is no way to control the compressor. Even when the light if off, the compressor can be on. So on a warm day, with a window down a little or the roof opened, the AC system may be on when it should not be. I guess I'd rather have a switch that really turned the compressor off or on.
yeah me too winter days and the compresor on ! no good for gas economy but.. i think the compresor turn on a few minutes then turn off automatic every period of time, same case in summer and that's good for gas economy
I owned an old Olds Cuslass with automatic heating/cooling and it worked like the Grand and most likely all systems. I'm going to see if there is a wire that I can intercept with a switch to keep the compressor off. My 08 Mustang does not have an auto sys and I can turn the compressor off and on with the AC switch.
I sure wish this was true, that's exactly what I want. Cool air out the vents with NO compressor on at all. But it goes on and that's my complaint. Took it to Jeep experts and was told you have no control over the compressor, factors involved in this design are numerous. I'm going to add a switch to completly turn it off.
But it is true (at least on the 2012 WK2). Mine works this way. I did initially have problems, but after the TIPM was replaced it now works as it should.
Have your dealer (Jeep experts) check page 404 of the Owners Manual:
"If Economy mode is desired, press the A/C
button to turn off the A/C mode in the ATC display and deactivate the A/C system.
• If the system is in Mix, Floor or Defrost Mode, the A/C
can be turned off, but the A/C system shall remain
active to prevent fogging of the windows."
Sounds like something is not working properly on your vehicle.
There is also a TSB (No. 24-002-12) for the HVAC system. Although it is primarily for the remote start A-C issue, it wouldn't hurt to have it performed if you haven't already. This bulletin involves flash reprogramming for the Automatic Temperature Control Module,
OK, I see that. But remember also, each feature (pg. 404) operates independently of each other. If any one feature is controlled manually temperature control will continue to operate automatically. Therefore if it is 80 outside, and your temp settings are 75, the compressor will come on to lower the temperature in the truck. If winter ever ends I will look into this more fully and see what mine is doing. I have a 2012. The dealer did not tell me that you can't control the compressor, Jeep engineering did. Thanks for your information.