I have 2008 F-150 Lariat with 76,000 miles. Garage kept. Does anyone have a fix for the A/C & Computer NOT talking to each other ? This all started with IP cutting out. It was replaced and took several IP's and after several "Flashes" it finally worked. Then the A/C stopped working. It was checked and it is full of Freon and if jumped the compressor works, but doesn't work through controller unit. The heat does work.. Several computers were tried and "Flashed" and it still doesn't work. My Shop referred to Ford Motor Company Dealer for assistance. They told My shop to take it to the junk yard. I have contacted Ford Motor, but do to the year of my truck they NO longer support the product.
Does anyone have any fixes ?

 

What's the "IP"? Did you look into buying new HVAC controls? The Lariat controls should still be available on https://www.onlinefordpartscatalog.com/ or Ford Parts Giant.

 

IP = Instrument Panel.

No I haven't tests indicate that is NOT the problem.

 

you need to find a scan tool that can monitor "PIDS''

you need to make sure that the AC is being commanded on when you push the button, if it is being commanded on then well you have a problem else where. also make sure the ambient air temp has a valid reading as well. Don't shot gun parts at it

either diag it properly yourself or pay a qualified tech to diag it. you will come out ahead

 

The vehicle was at the Ford Dealer and they are the ones that told me to take it to the Junk Yard..