I have a question about the air conditioning between a Diesel and Gasser. I have both and the Gasser is colder by a long shot. I asked the server rep if he could get the diesel AC as cold as my V10. He said that AC in diesel are not as cold as AC in Gassers. Is this true?

 

in a word NO

 

See if there's a heater control valve on the water line going to the evap box. My '03 didn't have one and I added it with an aftermarket kit. It stops the hot coolant from going through the heater core while the A/C is running.

Or, if you already have one, check the function of it.

More info: https://www.ford-trucks.com/forums/1...-question.html